Much of my internal systems are no longer biological. My thought process is partially governed by a computer and partially by an organic brain. I can be upgraded. I can be programmed, and skill sets can simply be installed - though experience will make me learn and adapt them to match me and any other individuals involved further.

[The real answer is 'I'm not human because Master Porky says I'm no longer human' but that explanation doesn't have enough of a logical basis for him to use it. It just - is his real reason, and what he's said are the additions.]