真しん理り関かん数すう

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Meanings

1

noun

truth function

Technical term in logic and philosophy; a function that takes truth values as input and returns a truth value.

真true, reality, Buddhist sect

理logic, arrangement, reason

関connection, barrier, gateway

数number, strength, fate

真しん理り値ち
真理値 is a truth value (true/false), while 真理関数 is a function that maps truth values to a truth value.
命めい題だい論ろん理り
命題論理 is propositional logic, the system in which truth functions are studied.

Compound of 真理 (truth) and 関数 (function), likely a calque from English 'truth function'.