Ray Comfort is a liar.
I am amazed at the lack of coherent logic in Ray's arguments. Lets start with the basics, "If you have lied, then you are a liar". According to the dictionary, a liar is, "A person who tells lies" -Random House. "Tells lies", not "have lied". (To be fair, WordNet does define it as someone who has lied, but not MW, AH, or others.) That seems to me to be a deliberate and ongoing distortion of a fact that is repeated by Ray rather consistently. Therefore, Ray is a liar because he continually lies, (about the definition of liar) not because he has "lied".
To illustrate the idiocy of his argument, one only has to take it to the obvious conclusion. Did you ever wet your pants? (even when you were a baby?) Then you are a pants wetter. Ever get drunk? If so, you must be an alcoholic. And I don't even want to consider what the process of being born makes me! The logic just doesn't hold up. And the funny part, since he is lying to get people to believe in G-d, then he is lying in G-d's name, and is therefore committing blasphemy in the process.