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The English word theory derives from a technical term in philosophy in Ancient Greek.As an everyday word, theoria, θεωρία, meant "looking at, viewing, beholding", but in more technical contexts it came to refer to contemplative or speculative understandings of natural things, such as those of natural philosophers, as opposed to more practical ways of knowing things, like that of skilled ...
For example, atomic theory is an approximation of quantum mechanics. Current theories describe three separate fundamental phenomena of which all other theories are approximations; [28] the potential unification of these is sometimes called the Theory of Everything. [7]
Almgren–Pitts min-max theory; Approximation theory; Arakelov theory; Asymptotic theory; Automata theory; Bass–Serre theory; Bifurcation theory; Braid theory; Brill–Noether theory; Catastrophe theory; Category theory; Chaos theory; Character theory; Choquet theory; Class field theory; Cobordism theory; Coding theory; Cohomology theory ...
For example, miasma theory proposed that all diseases were transmitted by "bad air". The modern germ theory of disease has found that diseases are caused by microorganisms, which can be transmitted by a variety of routes, including touching a contaminated object , blood , and contaminated water .
The theory-theory (or ' theory theory ') is a scientific theory relating to the human development of understanding about the outside world. [1] This theory asserts that individuals hold a basic or 'naïve' theory of psychology (" folk psychology ") to infer the mental states of others, [ 1 ] such as their beliefs, desires or emotions.
Social comparison theory – suggests that humans gain information about themselves, and make inferences that are relevant to self-esteem, by comparison to relevant others. Social exchange theory – is an economic social theory that assumes human relationships are based on rational choice and cost-benefit analyses. If one partner's costs begin ...
Game theory studies strategic interaction between individuals in situations called games. Classes of these games have been given names. Classes of these games have been given names. This is a list of the most commonly studied games
For example, an essentially correct theory may need some conceptual or factual revisions; atomic theory, first postulated millennia ago (by several thinkers in Greece and India) and the two-fluid theory of electricity [9] are two cases in this point.