Interestingly, the PI website claims their staff will debate anybody, anywhere, anytime, on any subject and destroy them.
This rather odd claim implies that they have no belief system of their own.
Actually the exact text says "mutually opposing interest."
The ability to "debate" without regard to the principle that is to be upheld, is more in the order of settling arguments by dueling, in which the challenge is not to prove the rightness or wrongness of the issue, but who is more able to handle the weapon of choice.
These exceptional mental gymnasts are so agile, they may succeed in perching on a razor-wire fence almost indefinitely. But at some time, the debate must end, and action undertaken. Unprepared for action rather than words, they are defenseless.