practicality

As nouns the difference between practicality and usefulness

is that practicality is the state of being practical or feasible while usefulness is the quality of being useful, to which extent something is useful.

In uncountable terms the difference between logic and practicality

is that logic is the part of a system (usually electronic) that performs the boolean logic operations, short for logic gates or logic circuit while practicality is the state of being practical or feasible.

As an adjective logic

is logical.

As a verb logic

is to engage in excessive or inappropriate application of logic.

As nouns the difference between taxonomy and practicality

is that taxonomy is the science or the technique used to make a classification while practicality is (uncountable) the state of being practical or feasible.