"Free will" consists of the ability of a person to determine their own future actions by some entirely internal process (which can observe, but is not controlled by, external factors); where "person" is defined as a collection of stuff such that the collection of stuff that makes up you has no overlap with the collection of stuff that makes up me and neither of us have any overlap with the collection of stuff that makes up (say) Barack Obama, or Trevor Noah, or Jacob Zuma.
Do you understand "is not controlled by" in such a way that having "free will" is inconsistent with (1) purely deterministic physics and/or (2) purely deterministic+random physics? (On the face of it your definition makes free will inconsistent with #1 but not with #2, but I can e.g. imagine a definition that restricts those "external factors" to, say, the state of the world outside one's body in at most the last year, in which case "free will" might be compatible with outright determinism.)
Another month, another rationality quotes thread. The rules are: