I Feel Certain That I'm Wearing Clothes Right Now

"If I know something with certainty, it can't be the case that it's going to turn out not to be true," he says. "So knowledge of absolutely certain for necessary truths is different." The only necessary truths can be known in that specific sense,. And then he gets into certainty of these distinctions between, and this is where it really gets hairy, but four main types of expressions in which we say 'I feel certain' We wouldn't even use that expression.