Question

said \the unexamined life is not worth living\ and \the only true wisdom is in knowing that you know nothing.\ plato aristotle socrates alexander

Explanation:

The quote "The unexamined life is not worth living" and "The only true wisdom is in knowing that you know nothing" are associated with Socrates. Plato was Socrates' student, Aristotle was Plato's student, and Alexander was a historical figure (Alexander the Great) not known for these philosophical quotes.

Answer:

Socrates