Nothing off the shelf comes to mind but given a suitable grammar (which judging by your examples would probably need just a few rules(*)) you could get something using Parse::RecDescent building a parse tree fairly easily.

(*) Been a while so it's not the right syntax, but along the lines of: STATEMENT => EXPR OP EXPR, EXPR => TERM OP EXPR | TERM, OP => "<=" | ">=", "=", TERM => /A-Z/ | /\d+/

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: Logical Equations by Fletch
in thread Logical Equations by artist

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