no experience needed
"Total failure is excluded a priori,
for at a 'deeper' level
all processes will always be seen to culminate in success;
and since there must always exist
a level 'deeper' than that of any given insight,
there is in principle no empirical test
of what constitutes 'ultimate' success or failure.
Teleology is a form of faith
capable of neither confirmation or refutation
by any kind of experience;
the notions of evidence, proof, probability, and so on
are wholly inapplicable to it."
Isaiah Berlin in Liberty:
Essay on Historical Inevitability