I get that, but at a certain level of roll it needs to be a definitive answer. Even if you don't beat the DC, a roll like 25 should at least get something back like, "You don't know why but you're getting bad vibes."
Otherwise players just feel lost and like the character's expertise means nothing.
"None that you can see" is a fun response. Especially on a high roll, if you're rolling knowledge and perception checks in the open. Gets 'em good and weirded out.
That should always be the response. It keeps it consistent. It should never be "there are no traps" because it's a comment on their characters knowledge, which is just that they can't see any. There's never a guarantee.
For the curious, the image is from the movie Automata starring Antonio Banderas, which is more or less an extrapolation of I, Robot's premises in a PK Dick style post-apocalyptic setting. Worth watching IMO. wait nvm i looked again and it's K2SO lol im high