Anyway the better question to ask instead of your erroneous one would be, how many professional biologists can you find that agree that human life begins at conception? (note; you should specifically ask developmental and EvoDevo biologists as this is their forte). We'll await your results, if you need help finding some professional Devo/EvoDevo biologists to ask let me know and I can point you in the correct direction.
Erroneous? It's erroneous because you're a failure in providing an answer. Your "better" question? Okay.
You failed to understand, I didn't "not provide an answer". "Life" is a subjective definition we create, there is no "law of life" nor natural phenomena of life. Viruses for example are non-living because we arbitrarily define life. Life occurs across a spectrum of shades of gray. So the question does "life" start at conception is a stupid question. Life occurred prior to conception because down here on earth life begets life. All cells, by our definition are alive.
Hence you need to learn to ask the right question: When does human life begin.
The question of does "life" begin at conception is a stawman. That answer is yes, obviously because we define life (see previous post) that includes cells (all cells). That isn't the real issue though (hence your strawman, or again maybe you are just innocently ignorant), the real issue is when human life begins. I already pointed out, "life" has never nor will ever be afforded the same rights as people. If it were you could say goodbye to hamburgers, antibiotics and sneezing (all of which kill "life").
Learn to ask the right question, then you can argue about the answer cowboy.