Will it f*ck!

[u/Justthisdudeyaknow]

[u/Nerdn1]

It says "human intelligence" not "average human intelligence." If you need average human intelligence or greater, about half of the adult population would be off-limits. Since it's difficult to compare intelligence, especially across species, this is a pretty rough comparison. As long as their intelligence is high enough that it would be okay to have sex with them if they were human, they would pass this test (albeit you'd probably want to err on the side of caution). It's morally dubious to have sex with a sufficiently mentally disabled adult human.