Because you cannot make such a claim with any certitude. You can only do so by making a number of assumptions and hoping you are correct. It is you who are "making claims about what you know nothing about." Whatever you have as a compass for determing what is worthy of acceptation, it is no more worthy of scientific consideration than the Koran.
I left my reply as was and gave you several openings. Your ignorance is willful. That's not an ad hominum, it's a fact and you've just proved it. You know no more about science than my cats, you talk as if you're an expert and you refuse to think rationally.