Because it is not a simple undertaking.
Do you think linguists know every stage - every form of every word - that Common Celtic went through on its way to modern Welsh? Of course not. Is linguistics therefore bunk?
Do you know exactly where each of Our Lord's footsteps fell on the way to Calvary? No? Then your Crucifixion model is also bunk.
We can give you the general outline of what you ask for. We can back up everything we say with evidence. We cannot provide you with a fossil skeleton of each individual, though.
™ Version 4.2
