He can’t say it definitely because, even though the observational results are convincing, you’d want to produce biological/neurological evidence to be able to make the claim with certainty.
Sure. Then imho if he can’t say it definitively, he should not make the first claim (slipping in weasel words like ‘could’ and ‘up to’ serve as a lazy catch-all disclaimer in that case.)
He can’t say it definitely because, even though the observational results are convincing, you’d want to produce biological/neurological evidence to be able to make the claim with certainty.
Sure. Then imho if he can’t say it definitively, he should not make the first claim (slipping in weasel words like ‘could’ and ‘up to’ serve as a lazy catch-all disclaimer in that case.)