You most certainly can gain enough knowledge to make conclusions about personal identity without knowing math. Ask an impressive physicist: [...]

The critical step however involves asking a physicist and accepting his opinion on authority. Such evidence is by no means invalid, to be sure, but it's something quite different from the original context, which was about understanding things yourself. (Plus, the weight of this evidence should be discounted due to the fact that the question is, strictly speaking, outside of the physicist's immediate domain of expertise, and dependent on issues that raise significant controversy.)