A Nice Little Bit of Sophistry(From a burned out law student)

This sentence is a lie.

I'll use the following definitions:

TRUTH--Binary 1. Correct as a proposition. Exists.

FALSE--Binary 0. Can be stated as NOT. Negation.
LIE--Opposite of TRUTH. Is the conjunction of mathematical falsity(FALSE) and propositional correctness, i.e. NOT TRUTH.

Beginning from the sentence's internal logic: If the sentence is a LIE, then we can infer that "it is FALSE that it is TRUTH". We rewrite the sentence as: "This sentence is NOT TRUTH" or "This sentence is FALSE".

As the sentence states it is a LIE, but is NOT TRUTH and FALSE*, we can clearly negative it to get a TRUTH, since the opposite of a LIE is TRUTH, and negativing creates an opposite. Negativing "This sentence is a lie," we get "This sentence is a TRUTH."

Since the sentence states that it is a LIE, or the opposite of the TRUTH, the sentence is externally seen to be FALSE as a proposition.

To be FALSE as a proposition is to be the opposite of TRUTH, or a lie. So, we can say with some certainty that it is TRUTH that the sentence is a LIE.

The sentence states that it is a LIE.

Thus, the sentence is TRUTH.

Stop.