You'll basically end up at solipsism if you follow this reasoning. There are good arguments against solipsism, e.g. that people smarter than you exist, and you

You'll basically end up at solipsism if you follow this reasoning. There are good arguments against solipsism, e.g. that people smarter than you exist, and you forget where things are, only to rediscover them, then remind yourself you forgot, and so on. You have to play increasingly tortured games to keep believing that nothing exists outside your mind.