Deduction
Part of speech: noun
Definition: that which is deducted; that which is subtracted or removed a sum that can be removed from tax calculations; something that is written off a conclusion; that which is deduced, concluded or figured out the ability or skill to deduce or figure out; the power of reason a. a process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
Example sentence: He did not arrive at this conclusion by the decent process of quiet, logical deduction, nor yet by the blinding flash of glorious intuition, but by the shoddy, untidy process halfway between the two by which one usually gets to know things.
Subtraction
Part of speech: noun
Definition: (uncountable) The process of subtracting a number from another.(countable) A calculation involving subtracting.The removal of something.