i really dont like the criterion of embarrassment. i mean i understand why you WANT the criterion of embarrassment, you have this source you want to use, because nothing better tells you about the period in question, but you know the source is full of lies, so you say "well, we can tell the truth from the lies by identifying the less flattering aspects, which one would be unlikely to lie about". sure, very intuitive. but i dont think theres good reason we should expect it to work! people tell "embarrassing" lies all the time!
like okay, for example, greek myths are full of embarrassing descriptions of the greek gods, various things they did that they shouldnt have, mistakes and failures, wrongdoings, etc. and the greek gods are venerated, honored, why would you make up these embarrassing stories about them? should we expect, then, that these parts of the myths are "truer" than the other parts? no, obviously not! people tell embarrassing stories because stories about people who always act rightly and nobly are boring! stories need drama, and things that surprise you, and flaws and growth and etc etc.
like, i guess theres a weak form, where we say the embarrassing stuff is comparatively MORE LIKELY to be true. but "more likely" is relative to a low bar
this post was actually inspired not by biblical exegesis but by someone claiming that we can know with a good amount of certainty that the guy who founded the iroquois confederacy was in fact founded by a huron with a speech impediment, because thats what the oral histories, say, and why would you lie about that (its embarrassing to be huron, an enemy group, and embarrassing to have a stutter). but like. do YOU know the tropes of iroquois storytelling circa 1000 AD? no you do not! you are guessing on what they would find embarrassing! maybe they had a wise foreigner trope! maybe they had a different conception of the significance of stutters (cf moses' speech impediment). maybe they thought stutters indicated a thoughtful, scholarly character! you are guessing!
Or perhaps they thought that those things were embarrassing, but that this contrast served to emphasize his valorous qualities even more through the contrast.
Lots of possibilities.
I'm pretty sure that what's presented as the weak form here is just the normal form? It'd be silly to hold the criterion of embarrassment as proof in anything but rhe most exceptional cases, but it's generally relevant as circumstantial evidence. (In some cases it may be evidence against the authenticity of a source, though, like if a king harshly enforced positivity during his lifetime but was widely slandered centuries later.)
Ideally you want to be -- I'm sorry! -- Bayesian about it, like you weigh your a priori assessment of different possible worlds (like "the early Iroquois thought foreigners with speech impediments were lame" vs. "actually they thought they were cool", or "these details were factual" vs. "these details were political propaganda"), and then you assess how those probabilities shift after accounting for the cringe compilation. It isn't enough just to float other hypotheses, it matters how comparatively likely they are given the details!
It's true of course that "this account is embarrassing" isn't very decisive by itself, but the criterion of embarrassment mostly seems to come up when weighing elements of sources whose credibility we've already judged -- I presume the oral history example is intended less as "we think this oral history is true because of how embarrassing this detail is" and more like "we're pretty confident in the broad strokes of this oral history, so we're also pretty confident in this specific detail, due to the criterion of embarrassment."





