Final answer:
Deductive reasoning does not need to consider variables as it relies on the structure of arguments to guarantee the truth of the conclusion.
Step-by-step explanation:
Deductive reasoning, also known as deduction, is a type of logic that uses a general principle or law to make specific predictions or conclusions. It involves moving from general observations to specific results based on the validity of the general principles. Deductive reasoning does not need to consider variables, as it relies on the structure of arguments rather than specific values.
Deductive reasoning involves drawing specific conclusions from general premises or principles. It is characterized by logical progression, where if the premises are true, the conclusion must also be true. Deductive reasoning is used in mathematics, philosophy, and problem-solving, providing a sound method for deriving valid conclusions. For example, in a disjunctive syllogism, if premises such as 'X or Y' and 'Not Y' are true, then the conclusion 'Therefore X' must also be true.