Hello you two,

May I tell you the way I undestand Liar Liar :

– Fletcher is both the protagonist and the antagonist: a two-faced people like JANUS (https://en.wikipedia.org/wiki/Janus)
– His heroe?s journey will makes him able to switch the two.
– That perfectly concord with the myth of JANUS who was the god of beginnings, transitions and endings.

Beginning:
– Fletcher-One is a liar and according to his way of life, this is a force. His flaw is his son?s vow which prevents him to lie.
– Fletcher-Two loves his son, he likes to play with him… His flaw is that he is a liar giving precedence to his job and breaking his promises.

Transition:
– Fletcher-One tries desperatly to delay the case, then wins without liying when he discocers his client lay about her age, making her marriage invalid.
– Fletcher-Two discovers that his client is interested only by money, then shouts at the judge to reverse the decision, what makes him taken to jail for contempt of court. This makes him able to undestand his situation towards his son and his ex-wife.

Ending:
– Fletcher-One is dead in jail as a liar.
– Fletcher-Two struggles to win back his son and his wife, and wins.

JANUS should be the god of screenwriters, I think.

All the best.

JM 🙂