<Li> Philosophy: Proof theory--Speculative reason--Theory of truth--Type theory--Value theory--Virtue theory </Li> <Li> Physics: Acoustic theory--Antenna theory--Atomic theory--BCS theory--Dirac hole theory--Dynamo theory--Landau theory--M - theory--Perturbation theory--Theory of relativity (successor to classical mechanics)--Quantum field theory--Scattering theory--String theory--Quantum information theory </Li> <Li> Psychology: Theory of mind--Cognitive dissonance theory--Attachment theory--Object permanence--Poverty of stimulus--Attribution theory--Self - fulfilling prophecy--Stockholm syndrome </Li> <Li> Public Budgeting: Incrementalism--Zero - based budgeting </Li>

How does the definition of theoretical differ from everyday thinking and the scientific definition