Logic
Part of speech: noun
Definition: A method of human thought that involves thinking in a linear, step-by-step manner about how a problem can be solved. Logic is the basis of many principles including the scientific method. The study of the principles and criteria of valid inference and demonstration. The mathematical study of relationships between rigorously defined concepts and of proof of statements. A formal or informal language together with a deductive system or a model-theoretic semantics. Any system of thought, whether rigorous and productive or not, especially one associated with a particular person. The part of an electronic system that performs the boolean logic operations, short for logic gates or logic circuit.
Rational
Part of speech: adjective
Definition: Reasonable; not absurd, foolish, emotional, or fanciful.Capable of reasoning.Of a number, capable of being expressed as the ratio of two integers.Of an algebraic expression, capable of being expressed as the ratio of two polynomials.
Part of speech: noun
Definition: A rational number: a number that can be expressed as the quotient of two integers.