Human knowledge:

afferent nerves animal inference argument assert assume astronomical atom axioms behaviour belief body called causal laws causes Chapter common sense complete complex complex of compresence concept concerned connection consider consists defined degree of credibility egocentric particulars empirical evidence example exist expectation experience express fact false falsehood finite follows frequency theory fundamental class given gramophone record happen hear hypothesis induction instance interpretation involved kind knowledge language Leibniz logical mathematical matter means memory minimum vocabulary naive realism observed occur ostensive definition perceived perception physical objects possible postulate premisses present principle principle of indifference probability proper names properties propositions protons psychology qualities question reason regard relation sensation sentence shade of colour similar solipsism space space-time specious present statement structure suppose theory theory of relativity things true truth valid visual visual percepts words