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Doesn't the existence of multiple LUAs contradict either the word 'last' or the word 'universal'?

The possibility of 2 non-monozygotic twins having identical genes is not zero, just astronomically low. Its the same for LUA.

The possibility of you turning into a teapot is non-zero, just astronomically low.

Is it really possible?

Mathematically speaking, yes, it is. The probability of any event in this universe is non-zero.

Seriously? Can you point to some links?

Yes, except that the correct number isn't 1.

It's 2. :)

Why? Its the ancestor of all organism, including single celled bacteria.