"…our brains possess involuntary mechanisms that make unbiased thought impossible yet create the illusion that we are rational creatures capable of fully unders

"…our brains possess involuntary mechanisms that make unbiased thought impossible yet create the illusion that we are rational creatures capable of fully understanding the mind created by these same mechanisms." Any theory that posits we are not rational creatures is self refuting. If I can't trust my mind to reliably deliver rational conclusions, why should I trust it to have delivered a rational conclusion about the very theory I'm proposing?