.....aaaaaaaaand thats proof right there that ANYbody can say ANYthing, but it doesnt make it valid. How do you know you ate breakfast or lunch today? How do you know you are breathing right now? Hwo do you know this is a boxing forum? How do you know? How do you know? HOW DO YOU KNOW? You can train a parakeet to ask that question as a rebuttal to anything anyone ever says. It doesnt mean that it means anything though. Its just words:

h-o-w d-o y-o-u k-n-o-w , its just a combination of letters. Means nothing. That question means nothing. Has no meaning. "How do you know?"