Is Lying Immoral (Sinful, Illegal)?

[Boof-head]

Lying is polarized belief; polarizing knowledge takes longer.

[Boof-head]

This also necessarily implies the only thing you can do with a lie is lie (or tell the truth) about it being a lie.

Hence, polarization; the act of lying simply polarizes a belief or a proposition about being able to lie.
If this is not true, then there is a lie which can't be lied about, or a truth which cannot be truthfully spoken about = stated propositionally (think about that for a second or two).

We can say or think "I am telling the truth, or being honest - with others and myself", and so we can say or think: "I am lying, or not being honest with myself and with others".