Latin A Priori ay pry-OR-eye A Latin term meaning "from the earlier." It refers to knowledge or justification that is independent of experience or observation, derived from theoretical deduction or reasoning. The philosopher argued that the existence of God could be proven a priori, without relying on empirical evidence. In the U.S. Supreme Court case Griswold v. Connecticut (1965), the Court used a priori reasoning to establish a constitutional right to privacy, based on inferences from other rights explicitly protected in the Bill of Rights. ← Back to BrowseNext Term →