Falsification gets us closer to knowledge than corroborating evidence.
We know more about others through their failures and flaws than through their virtues and accomplishments
Likewise the way someone is WRONG is often more philosophically, epistemically interesting — than the way they are right
You can be right, or rather, sound right, merely in:
-repeating what others have said
-repeating what usually works (even if it’s not, in truth, the optimal method)
-being plausible and sounding convincing
-reasoning logically (even though the premises are wrong)
-etc.
But when you’re wrong, clearly wrong — that is an indictment of some part of your truth-seeking process
And therefore reveals a more universal and general truth about the quality of your reasoning, truth-seeking,
and thus where you can be trusted to get it right
Which of course is crucial
You want to reason more accurately
You don’t want a weakness in your truth-seeking process, that has you make the same mistake time and time again
And of course you want to know who to trust, with WHAT
The world is largely made of people, that you deal with. You want to know how to deal with them to accomplish your goals