Theoretical describes ideas that are based on principles and models rather than direct practical experience. It often refers to what could happen in theory, even if it hasn’t been tested in real life yet.
From Late Latin *theoreticus*, from Greek *theoretikos* 'contemplative, speculative', from *theorein* 'to look at, consider'. It’s related to 'theory', focusing on abstract thinking and observation.
Calling something 'theoretical' isn’t the same as calling it fake; it means the idea is built from reasoning instead of direct trial. Airplanes were once 'theoretical aerodynamics' on paper before engineers turned those equations into engines and wings.
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