- G.A. Cohen(the subject of the debate being referenced)
- A British philosopher (1941-2009) who wrote about fairness and justice, and was famous for challenging and improving upon other philosophers' ideas about equality.
- Internally coherent(describing philosophical frameworks)
- When a system of ideas holds together logically without contradicting itself—all the pieces fit together and make sense.
- Libertarianism(as used in philosophy of free will)
- The philosophical view that humans have genuine free will—our choices aren't determined by prior causes and we're truly responsible for what we do. (Note: this is different from the political meaning of 'libertarianism.')
- Substantive assumptions(as used in philosophy of science and research methodology)
- Real, meaningful beliefs or choices you've built into your approach that actually affect the results—as opposed to trivial technical details that don't matter much.
- World-ownership(as an assumption needed to complete libertarian ideas)
- A theory about who owns natural resources, land, and the physical world—a question about whether things belong to individuals, everyone collectively, or nobody initially.
- self-ownership(Nozick's libertarian argument against taxation)
- The thesis that people own themselves and hence their talents, and therefore own whatever they can produce with those talents.
- underdetermines(logic and language)
- Doesn't fully decide or pin down; leaves open multiple possible interpretations because there isn't enough information visible to choose just one.