The main difference between Theoretical and Hypothetical is that the Theoretical is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking and Hypothetical is a proposed explanation for a phenomenon.
A theory is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking. Depending on the context, the results might, for example, include generalized explanations of how nature works. The word has its roots in ancient Greek, but in modern use it has taken on several related meanings.
Theories guide the enterprise of finding facts rather than of reaching goals, and are neutral concerning alternatives among values. A theory can be a body of knowledge, which may or may not be associated with particular explanatory models. To theorize is to develop this body of knowledge.
As already in Aristotle’s definitions, theory is very often contrasted to “practice” (from Greek praxis, πρᾶξις) a Greek term for doing, which is opposed to theory because pure theory involves no doing apart from itself. A classical example of the distinction between “theoretical” and “practical” uses the discipline of medicine: medical theory involves trying to understand the causes and nature of health and sickness, while the practical side of medicine is trying to make people healthy. These two things are related but can be independent, because it is possible to research health and sickness without curing specific patients, and it is possible to cure a patient without knowing how the cure worked.
In modern science, the term “theory” refers to scientific theories, a well-confirmed type of explanation of nature, made in a way consistent with scientific method, and fulfilling the criteria required by modern science. Such theories are described in such a way that any scientist in the field is in a position to understand and either provide empirical support (“verify”) or empirically contradict (“falsify”) it. Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge, in contrast to more common uses of the word “theory” that imply that something is unproven or speculative (which is better characterized by the word hypothesis). Scientific theories are distinguished from hypotheses, which are individual empirically testable conjectures, and from scientific laws, which are descriptive accounts of how nature behaves under certain conditions.
A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words “hypothesis” and “theory” are often used synonymously, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research.
A different meaning of the term hypothesis is used in formal logic, to denote the antecedent of a proposition; thus in the proposition “If P, then Q”, P denotes the hypothesis (or antecedent); Q can be called a consequent. P is the assumption in a (possibly counterfactual) What If question.
The adjective hypothetical, meaning “having the nature of a hypothesis”, or “being assumed to exist as an immediate consequence of a hypothesis”, can refer to any of these meanings of the term “hypothesis”.
Of or relating to theory; abstract; not empirical.
Based upon a hypothesis; conjectural
conditional; contingent upon some hypothesis/antecedent
A hypothetical situation or proposition
“These hypotheticals serve no purpose until we have more information.”
concerned with or involving the theory of a subject or area of study rather than its practical application
“the training is practical rather than theoretical”
“a theoretical physicist”
based on or calculated through theory rather than experience or practice
“the theoretical value of their work”
based on or serving as a hypothesis
“let us take a hypothetical case”
supposed but not necessarily real or true
“the hypothetical tenth planet”
denoting or containing a proposition of the logical form if p then q.
a hypothetical proposition or statement
“officials refuse to discuss military policy except in coy hypotheticals”