I agree with the sentiment behind this, if not the outright statement. We apply validity based on what we know to be true. This is how we analyze everything in life. If personal experience or schooling dictates that something is impossible, it usually is. If we accept everything to be truth, just in case it might be, we are being irresponsible. I'm not saying you should walk into everything with incredulity. But I do believe that forsaking scientific knowledge in favor of a scientifically unproven belief system sounds an awful lot like religion itself. I believe in keeping an open mind about everything until you gather enough information to lead you one way or another.