Descartes's mediator
And with this, the project has begun. Descartes’ meditator quickly
begins by rejecting the commonsense epistemological principles on
which everything he formerly believed rested, and quickly sets about
putting the world back together again. Of course, one of the central
projects undertaken in this connection must be the replacement of the
epistemological principles rejected with new, more trustworthy principles. Just as Descartes’ meditator undermined his former beliefs
by undermining the epistemology on which they were based, he will
rebuild his world by rebuilding its epistemology.