If stuff out there tends to admit stable conceptual structure, then evaluations persist and end up trustworthy.
Which is why I don't get Fe types waltzing around claiming subjectivity. Sure, feelin's are felt, the experience is subjective, but there's some kind of stability in there somewhere too, in't there? This sign is a marker for that feeling, tears and a smile and a flower in the hand denote... he's having an affair and faking an drinking problem too! Stuff like that. Regular truth-like connections between one marker and another feeling. How else do you get to be seers?
Mah Gawd, did I just define truth? That's not going to turn out well.