Strictly speaking, all biological phenomena are on a continuum. Our need for discrete terminology doesn't trump the laws of physics. So, of course you are wrong. There are a continua of chemical processes involved in the process of conception (albeit over a short period compared to gestation time).
Still, what criteria determine rights?
Well, strictly speaking, it's impossible to cross an infinite number of points in a finite period of time, so motion is thus impossible.
Come on. Are you telling me there's no way to tell the difference between (1) a sperm and an egg; and (2) a human life with human DNA? If so, then of course you are clueless.
Not to throw labels around indiscriminately, but you are thinking like a liberal. You seem inclined to apply complex answers to simple questions.