- Libertarianism (philosophical)(as the theory that requires sourcehood in free will)
- A philosophical position that argues humans have genuine free will—that our choices aren't completely determined by prior causes and that we are genuinely responsible for our actions.
- Pre-volitional(as a timing description for counterfactual truths)
- Occurring before someone makes an actual decision or choice (volitional means relating to will or choice).
- Robert Adams(the author being cited)
- A prominent American philosopher who wrote influential work on metaphysics and the nature of identity; this quote is from his essay on what makes something uniquely itself.
- Source/Sourcehood(as a requirement for genuine freedom in libertarian philosophy)
- The ultimate origin or cause of something; in this context, whether you (not external factors or prior conditions) are the true originator of your own actions.
- agent(Economics terminology applied to medical ethics)
- The party in a principal-agent relationship who is instructed to produce the good or service on the principal's behalf — in the medical context, the doctor
- counterfactual(Modal logic and epistemology)
- A conditional statement concerning what would be the case if some antecedent condition were true, evaluated across possible worlds; contraposition does not hold in general for counterfactuals.
- freedom(Philip's theory of free action)
- The capacity of a faculty to have acted otherwise than it did; primarily located in the will rather than the intellect.
- grounding objection(Applied to the case of David and Lump, which are perfect duplicates)
- An objection that appeals to the idea that properties such as temporal properties and persistence conditions must be grounded in more basic features of an object, raising a puzzle about how perfect duplicates could differ in such properties.