No, whats really funny is watching a doofus with an inferiority complex try to decide when his steak is done. Gee, I dont know. Maybe another couple of nanosec -- no, maybe more time -- I just cant be sure its truly ready. (Then, after 20 minutes of hand-wringing: ) Oops, now its ruined.
I am very impressed that you are so devoted to theory that you will not even attempt to answer fundamental questions. Very impressed indeed. Im less impressed by your unwillingness to acknowledge that there are points along a continuum at which certain conditions can definitively be said to be true. I accept and agree with (and frankly, expected) your explanation of water turning to ice. But surely you would agree that, at some point, the water can be tested to determine whether it possesses the qualities of a solid. At some point, there is no question that a jet aircraft is traveling faster than the sound waves around it. Likewise, at some point, there is no question that the organism in a womans womb is a living entity with its own human genetic code.
So, seeing as you and I are not communicating well, how about if I put it this way: If the organism has its own human genetic code and exhibits the characteristics of a living organism, it is a living human and thus should have human rights. Will that placate you? (And if not, will you agree your own rights are in jeopardy, given the apparent theoretical uncertainty of your own status as a human?) If you can accept that simple and non-arbitrary test, then your concerns about continua should evaporate. Other questions may arise, such as how you test for the stated condition, but those questions are more practical than theoretical, and not, as you may claim, arbitrary; and as science marches on, they become less daunting. Which is the original thrust of this thread.
PS: I thoroughly enjoyed the comment about extraterrestrials. The nerd-o-meter overheated when I read that one.