Definitions, hypothesis, previously proved theorems can be used to support conclusions made in proving statements by deductive reasoning.
Deductive reasoning can be defined as the process of reasoning in which two or more statements are used to reach a logically valid conclusion. The deductive reasoning always leads in the direction of condition, links, premises and finally reaches up to a conclusion.
Definition, hypothesis and previously proved theorems can lead to forming a valid conclusion. Hence, these help in deductive reasoning.
A definition can be defined as a statement which includes a meaning of a term.
A hypothesis can be defined as the proposed explanation for the phenomena based on observations and facts.
Previously proved theorems are based upon proves developed by application of scientific methodology.
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