Ileosa thinks she would have noticed if Choryon only had 7 Intelligence?
Intelligence as measured by detect thoughts correlates very well with potential for wizardry, quite well with mathematical ability and verbal proficiency, and if it doesn't correlate perfectly with what you would call general smarts - especially not above 15 INT or below 5 - she's never met someone with 7 INT who seemed notably clever. Choryon seemed clever. She would have guessed that Choryon had at least twelve Intelligence. Even ten, she could swallow, INT scores don't correlate that well with skill at language.
Seven?
(Ileosa would be a little less baffled if she knew any ogres with high Charisma; many of the factors of stupidity which in humans correlate with a low INT score are in fact correlates and not components of Intelligence. And Choryon, if she's even human, is visibly not entirely so. Still. Seven.)
That Lyvina is a once-in-a-generation math whiz who gets two bonus first-circle spells without a headband on doesn't feel nearly as strange to her, but that's pretty damn strange too. Lyvina seems clever, but not "this is as smart as people get" clever. Though maybe it'd be hard for Ileosa to tell, if she were?
Now take these two weird things and put them both in the radius of one detect thoughts. Usually when you cast detect thoughts you don't get two anomalies like that.
Call it a hunch, but Ileosa thinks that when she knows what these four people have in common, these four who met each other yesterday but wouldn't dream of outsourcing moral reasoning to anyone outside their group... when Ileosa knows what makes them a group, that 7 and that 20 will make more sense to her too.[1]
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1. This tag was written before the author of this piece committed to using the 3d6 bell curve for Intelligence rather than the Planecrash-standard. By the 3d6 curve, 20 INT is dramatically less exceptional (roughly corresponding to IQ 148 instead of 175) - and 7 INT is also less exceptional[2] in the other direction (roughly corresponding to IQ 82 instead of 77.5) ↩
2. Although it wasn't particularly exceptional to begin with.[3] ↩
3. I think that people anchor on the pointbuy when they consider what 7 INT means (or the meaning of 6, as rubs its sevenish shoulder) - because seven is as low as the pointbuy lets you dump a stat, it's thought of as the lowest that the stat can go. The wizard with 7 Strength is an object of ridicule, the barbarian with 7 Intelligence a monosyllabic drooling moron who chews on the furniture. But anyone reading this who can't overhead press 70 lbs (~32 kilograms) has less than 7 Strength. That's 5% of men and more than half of women. Likewise for 7 INT, 13% of adult humans have an IQ between 70 and 85 and they're perfectly ordinary people. ↩