What is your algorithm for determining which sentences are meaningless? Since we don't have such an algorithm (without serious flaws), I'm guessing your algorithm is probably flawed also, and I can perhaps exploit such flaws if I knew what your algorithm is. See also this quote from the IEP:
Many people, when first encountering the Liar Paradox, react by saying that the Liar Sentence must be meaningless. This popular solution does stop the argument of the paradox, but it is not an adequate solution if it answers the question, “Why is the Liar Sentence meaningless?” simply with the ad hoc remark, “Otherwise we get a paradox.” An adequate solution should offer a more systematic treatment. For example, the sentence, “This sentence is in English,” is very similar to the Liar Sentence. Is it meaningless, too? What ingredients of the Liar Sentence make it meaningless such that other sentences with those same ingredients will also be meaningless? Are disjunctions with the Liar Sentence meaningless? The questions continue, and an adequate solution should address them systematically.
What is your algorithm for determining which sentences are meaningless? Since we don't have such an algorithm (without serious flaws), I'm guessing your algorithm is probably flawed also,
The "beliefs should pay rent" heuristic mentioned by User:Tiiba already answers this. My method (not strictly an algorithm[1], but sufficient to avoid paperclip-pumps) is to identify what constraint such an expression places on my expectations. This method [2] has been thoroughly discussed on this internet and is already invoked here as the de facto standard...
Graham Priest discusses The Liar's Paradox for a NY Times blog. It seems that one way of solving the Liar's Paradox is defining dialethei, a true contradiction. Less Wrong, can you do what modern philosophers have failed to do and solve or successfully dissolve the Liar's Paradox? This doesn't seem nearly as hard as solving free will.
This post is a practice problem for what may become a sequence on unsolved problems in philosophy.