[kosta50]

Simply finding an archaeological record of testimony that someone was "healed" provides no evidence other than that the testimony was recorded

It also provides no evidence as to what caused them to be "healed."

[metmom]

It also provides no evidence as to what caused them to be "healed."

By the same token, nobody can claim that medicine can heal or cure anyone.

It's just assumed that the medicine or treatment was effective, but you don't know for sure if it would not have cleared up on its own without treatment.