Crying wolf

There's a bias that's a bit like an inverted appeal to authority: anyone who repeatedly and stridently makes claims that prove to be unsubstantiated, far-fetched, or outright false eventually finds that people simply stop listening.  At that point, even if they did come up with something reasonable and insightful, it's doubtful that anyone would pay attention.

We've seen a number of people who've exhausted their credibility in that fashion here at Skeptophilia.  Some notable examples:

• Geneticist Melba Ketchum, who has claimed several times to have hard evidence of the existence of Bigfoot (including its DNA).  She wrote a paper about her findings that she finally was able to get published -- but only in a "scientific journal" she herself started for the purpose.  Worse still, it turned out that most of the citations in the paper were bogus, including one that says in the cited paper itself that it was written as an April Fool's joke.
• Author Richard C. Hoagland, who despite having (direct quote from the Wikipedia article about him) "no education beyond high school level... no advanced training, schooling, or degrees in any scientific field" has become famous for a variety of loony pseudoscientific ideas, my favorite one being that the hexagonal cloud patterns on Saturn are "produced by the same phenomenon that causes crop circles."
• Journalist Jaime Maussan, who says he has conclusive proof that some mummies found in Mexico aren't human -- i.e., are aliens.  Surprising absolutely no one -- well, no one rational, at least -- the mummies that have been DNA tested are one hundred percent Homo sapiens, and the ones Maussan is the most convinced are aliens show signs of recent tampering to make them look less human.
• Mark Taylor, a prominent evangelical inspirational speaker, who claims that having orchestral instruments tuned to A = 440 Hertz is a secret plot by the Freemasons to alter your DNA so that you will hate Donald Trump.  I'd like to be able to say that this is the most insane thing that Taylor has said, but that unfortunately would be a lie.

All four of these people have found that restoring your credibility once it's shot is about as easy as getting toothpaste back into the tube.  Although in the case of Taylor, I suspect he doesn't care -- part of his shtick is that he's a Lone Voice Crying In The Wilderness, so he probably falls back on the impeccable logic of "Many brilliant truth-tellers have been considered crazy -- people consider me crazy, so I must be a brilliant truth-teller!"

In any case, the latest in this Parade of Shame is Luis "Lue" Elizondo, who was a U. S. Army Counterintelligence Special Agent and worked for the Undersecretary of Defense for Intelligence, and now is a prominent member of the UFO/UAP Truthers community.  Lately we've seen lots of claims that the U. S. government has concrete proof of extraterrestrial intelligence; a year ago there was a big hearing in Congress where people like alleged whistleblower David Grusch said they'd not only seen, but participated in the recovery and testing of, "non-human biologicals" and the spacecraft that allowed them to get here.  My point then, as now, was: fine, you want us to believe you?  Let's see the goods.  Turn at least some of it over to independent unbiased scientists for study, under peer review, and then we can talk.  But of course instead we have additional claims of an X Files-style coverup because of issues of national security, and so far what we've seen is bupkis.

[Image licensed under the Creative Commons MjolnirPants, Grey Aliens Drawing, CC BY-SA 4.0]

Now, Elizondo is publishing his memoirs, and you can bet they'll be replete with claims of UFO shenanigans.  The problem is, skeptic Jason Colavito got a hold of some advance excerpts, and besides the usual Cigarette Smoking Man antics you'd expect, Elizondo is making a whole bunch of other clams that make his UFO stuff look like Nobel Prize material.

One of the weirdest is that Elizondo says he's been haunted for decades by "glowing ghost bubbles."  There are green ones, clear ones, and blue ones -- the green and clear ones are harmless, he says, but the blue ones are "malevolent."  Then he launches into a bizarre passage about the veracity of the Book of Enoch -- one of the biblical Apocrypha, about which I wrote last year, and which (to put not too fine a point on it) is really fucking bizarre -- and in these excerpts he has a lot to say about our old friends the Nephilim:

Enoch's journey is filled with heavenly accounts, including descriptions of angelic and demonic hierarchy, God's throne, God's inner circle of guards, and even the language of the supernatural.  On paper, Enoch's travels don't sound that dissimilar to reported nonhuman encounters.  We also looked at the sixth chapter of Genesis.  That's the chapter that contains the story of Noah's ark.  Before we get to Noah, verses 1 through 4 of that chapter quickly share that otherworldly beings came to earth and mated with human women. Some translations call these offspring giants, while others refer to the visitors by the original Hebrew word, Nephilim, which some scholars say means something like fallen angels, or beings that cause others to fall.

At this point he seems to be aware that he's doing a synchronized skating routine with Erich von Däniken on very thin ice, because he goes on to say, "To be clear, I'm not advocating the ancient astronaut hypothesis that many today believe.  I'm simply drawing some interesting parallels."  Which is the woo-woo equivalent of making some loony claim and then excusing it by saying you're "just asking questions" (which a friend of mine calls "JAQing off").

The problem, of course, is that if Elizondo wanted anyone to take him seriously other than people who think Ancient Aliens is a scientific documentary, this kind of nonsense is not doing him any favors.  Admittedly, I haven't read the memoirs -- they're not available yet -- only the excerpts Colavito provided.  But honestly, given their respective track records, I'm much more likely to trust Colavito's perspective than Elizondo's.

And that's coming from someone who would dearly love to see hard evidence of extraterrestrial life.

So there you have it.  One more example of the Boy Who Cried Wolf.  Like any other bias, it can lead you astray; the whole point of the fable is that eventually there was a wolf, no one believed the boy, and the boy got turned into a lupine hors-d'oeuvre.  But even if it's a bias, it's an understandable bias.  If Elizondo really does have good evidence of aliens but has blown his own credibility to the point that no one is listening any more, he has only himself to blame.

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The truth is out there. Probably.

I've always been dubious about reports of UFOs.

To me, they always seem to come back to anecdotal evidence, which is lousy support for what is essentially a scientific conjecture.  As eminent astrophysicist Neil deGrasse Tyson put it, "If you're ever abducted, steal something from the spaceship, and bring it back with you... because then you'll have something of alien manufacture.  And anything that's crossed interstellar space is gonna be interesting.  But until then, we can't have the conversation... 'I saw it' just isn't enough."

The problem is, UFO sightings are incredibly common.  MUFON -- the Mutual UFO Network -- is devoted to keeping track of all the UFO sightings reported worldwide, and it's a full-time occupation.  (In the first half of 2018, there were 3,627 UFO sightings reported to MUFON, of which 647 were labeled "unknown" -- in other words, not accounted for by conventional explanations, at least in their opinion.)

Michio Kaku, the Japanese-born astronomer who has become a familiar face on documentaries about alien life, has weighed in on this, and has an interesting take on things.  "Ninety-five percent of all UFO sightings can be immediately identified as the planet Venus, weather balloons, weather phenomena, swamp gas.  You name it, we've got it nailed.  It's the other five percent that give you the willies.  Five percent remain totally unexplained...  We're talking about generals, we're talking about airline pilots, we're talking about governors of states, who claim that this is beyond our understanding of the laws of physics...  We've got multiple sightings from multiple sources.  Pilots, other eyewitnesses, radar.  These are very hard to dismiss...  And those are worth investigating with an open mind."

Which, I have to admit, is a good point.  However, it bears mention that Kaku himself has come under fire for his unorthodoxy, and in fact many of his colleagues think he's seriously gone off the rails, either because he's honestly crazy or because he knows that sensationalist pseudoscience sells.  (An especially scathing critique is the seriously unflattering RationalWiki page on Kaku and his claims.)

But this hasn't discouraged both the true believers and the skeptics who agree with Kaku that despite the complete lack of hard evidence, there's still something here worth investigating.  And they've found a couple of unlikely allies recently -- a retired intelligence officer named Luis Elizondo, and (of all people) Tom DeLonge, former front man for the rock band Blink-182.

Elizondo and DeLonge are unequivocal that we need to look into this further.  "Despite overwhelming evidence at both the classified and unclassified levels," Elizondo wrote, "certain individuals in the Department remain staunchly opposed to further research on what could be a tactical threat to our pilots, sailors, and soldiers, and perhaps even an existential threat to our national security."

It bears mention that Michio Kaku (in the interview I linked above) also emphasized the potential threat.  Any civilization that had mastered interstellar travel would likely be ahead of us, technologically, by thousands or even millions of years, and would view us much like we view an anthill -- as being not only not that interesting, but essentially expendable.  "There's no reason an advanced alien civilization would come bearing gifts and ask to be taken to our leader, any more than we bring crickets to ants and ask to speak with the queen."

DeLonge's involvement is curious, not because he's a true believer -- heaven knows, a lot of celebrities have odd ideas -- but because Elizondo and the others trying to convince the government to look into UFOs more seriously are mostly ex-government staffers and scientists, such as Jim Semivan (formerly of the CIA's National Clandestine Service), Robert Bigelow (a Nevada-based defense contractor), Chris Mellon (Deputy ­Assistant Secretary of Defense for Intelligence during the Clinton and George W. Bush administrations), and Hal Puthoff (formerly employed by the CIA and the Defense Intelligence Agency).  Including a musician makes for a little bit of an odd partnership.

And honestly, DeLonge seems to be involved mostly to get the message out, especially to younger people.  Elizondo is very cognizant of his sales pitch, and his quest is to reach as many influential people as possible.  Having a rocker on your side never hurts, publicity-wise.

As for me, I don't think there's anything wrong with further investigations.  After all, there could be something to some of those sightings.  Even though I tend to be in Tyson's camp, and believe that most UFO sightings are explainable from purely terrestrial causes (including the propensity of people to make shit up), I also agree with Kaku that if there's five percent -- hell, if there's one percent -- of the UFO sightings that are legitimate and have defied conventional explanation, they're worth looking into.

Plus, there's just the fact that I would really love it if intelligent aliens existed.  There's a reason I have this poster on my classroom wall:

I would rather it if the aliens turned out to be friendly, of course.  I could do without having Earth invaded by Vogons, the Borg, the Draconians, the Cardassians, Shoggoths, the Slitheen, Xenomorphs, or the Tcho-Tcho People.  Vulcans would be more what I'm hoping for.

But I guess in these circumstances, you shouldn't be picky.

So I'll keep hoping, however the skeptical side of me keeps telling me not to hold my breath.

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This week's Skeptophilia book recommendation is a fun one.  If you've never read anything by Mary Roach, you don't know what you're missing.  She investigates various human phenomena -- eating, space travel, sex, death, and war being a few of the ones she's tackled -- and writes about them with an analytical lens and a fantastically light sense of humor.  This week, my recommendation is Spook, in which she looks at the idea of an afterlife, trying to find out if there's anything to it from a scientific perspective.  It's an engaging, and at times laugh-out-loud funny, read.

[If you purchase the book from Amazon using the image/link below, part of the proceeds goes to supporting Skeptophilia!]

Unalloyed truth

A couple of weeks ago, the New York Times had an article about claims of a decades-long investigation by the Pentagon of the UFO phenomenon.  While I don't doubt that such a program exists, the article claims that there are warehouses full of "alien alloys" that have been declared unanalyzable.

The conclusion, of course, can only be that they came from outer space.

The article's authors, Helene Cooper, Ralph Blumenthal, and Leslie Kean, write:

Under [NASA employee Robert] Bigelow’s direction, [Bigelow Aerospace Company] modified buildings in Las Vegas for the storage of metal alloys and other materials that [military intelligence expert Luis] Elizondo and program contractors said had been recovered from unidentified aerial phenomena.  Researchers also studied people who said they had experienced physical effects from encounters with the objects and examined them for any physiological changes...  

“We’re sort of in the position of what would happen if you gave Leonardo da Vinci a garage-door opener,” said Harold E. Puthoff, an engineer who has conducted research on extrasensory perception for the C.I.A. and later worked as a contractor for the program.  “First of all, he’d try to figure out what is this plastic stuff.  He wouldn’t know anything about the electromagnetic signals involved or its function.”

I have two responses to this.

First, we are way beyond da Vinci in our understanding of the universe and in the development of technology to study it; this is a serious false analogy.  Second, once you claim that there are actual artifacts to study, you've moved beyond the realm of anecdote into something that's scientifically verifiable.  At that point, you better have the goods -- and be willing to admit it if it turns out that the answer isn't what you hoped it would be.

The week after the article went public, Scientific American's Rafi Letzter wrote a response to it, saying much the same thing (although in far greater detail).  Letzter writes:

"I don't think it's plausible that there's any alloys that we can't identify," Richard Sachleben, a retired chemist and member of the American Chemical Society's panel of experts, told Live Science.  "My opinion? That's quite impossible." 

Alloys are mixtures of different kinds of elemental metals.  They're very common - in fact, Sachleben said, they're more common on Earth than pure elemental metals are - and very well understood.  Brass is an alloy.  So is steel.  Even most naturally occurring gold on Earth is an alloy made up of elemental gold mixed with other metals, like silver or copper... 

"There are databases of all known phases [of metal], including alloys," May Nyman, a professor in the Oregon State University Department of Chemistry, told Live Science.  Those databases include straightforward techniques for identifying metal alloys.  If an unknown alloy appeared, Nyman said it would be relatively simple to figure out what it was made of.

Well, as we've seen over and over, the woo-woos are nothing if not persistent.  Just a couple of days ago, a response to the response appeared over at Mysterious Universe.  The gist of the article is "there are too alien artifacts and UFOs," but there was one bit of it that stood out from the rest.  The author of the article, Brett Tingley, writes:

While I’m sure that's true enough of everything we’ve found on our planet, I just have to wonder: given the vastness of the universe, is it actually impossible for unknown elements or alloys to exist?  Seven new elements have been discovered here on Earth in the last thirty years, while the majority have been discovered in the last four hundred.  On a long enough timeline, who knows what tomorrow’s science will uncover?

This is a roundabout example of the Argument from Ignorance: we don't know, so the explanation must be _________ (fill in the blank with your favorite loopy claim, paranormal phenomenon, or deity).  Normally, the Argument from Ignorance is hard to counter except to point out that our ignorance of something isn't indicative of anything but our ignorance; you can't use it to prove anything.  But wound up in here is an interesting bit that we can analyze from a scientific perspective; the claim that there could be undiscovered elements in "the vastness of the universe."

Here's the problem.  Mendeleev constructed the first periodic table of the elements by noticing some odd patterns -- that there were groups of elements that had similar chemical properties.  After some years of messing about to figure out what was going on, he was able to construct a grid that placed these elements into columns and rows.  And, most interestingly, there were holes -- places in the grid that there should be an element, but none had thus far been discovered.

And one by one, those holes were filled.  Then advances in nuclear physics allowed the creation of the transuranic elements -- the ones beyond uranium, atomic number 92, which are short-lived radioactive substances that do not occur naturally (any of them created by the supernovae that gave rise to the elements in the Solar System would long ago have decayed away).  We're now up to element 118, oganesson.

So Tingley is right that there have been new elements discovered in the last thirty years.  The problem is that most of them have extremely short half-lives and are highly radioactive, so the idea that UFO debris could be made of any of these newly discovered (newly created, really) elements is ridiculous.  But how about the other piece of his claim, that there could be other stable elements we haven't discovered yet?

Sorry, but that doesn't work, either; the periodic table has no holes left to fill, as you can see on the above illustration.  We can be extremely confident that we've got 'em all, and the only additions will be at the unstable and short-lived upper end.  So despite Geordi LaForge on Star Trek: The Next Generation constantly blathering on about how the phaser beams can't damage the alien ship because it's made out of an alloy of the elements gorblimeyum and gobsmackite, this isn't really possible.

Thus our labeling of Star Trek as "fiction."

I'm pretty certain that if the metallurgists and chemists were to examine the warehouse full of debris, they'd find any metal fragments to be composed of plain old ordinary metallic elements.  Now, there could be some piece of alien technology in there -- Puthoff's "garage door opener" -- but my guess is that if there was such incontrovertible evidence of alien visitations, the scientists would know about it.

Sorry for raining on your parade, if you're a UFO enthusiast.  I get your angst.  I would like nothing better than to have proof of extraterrestrial intelligence (or, even better, extraterrestrial visits, because that would mean that the aliens had figured out how to manage travel across interstellar space).  But until we have more than talk about "mysterious alien alloys," I think we need to once again table this entire discussion.