AIUI, legally, a signature isn't itself inherently binding to anything, neither necessary nor sufficient. You don't even need a signature to form a binding cont

AIUI, legally, a signature isn't itself inherently binding to anything, neither necessary nor sufficient. You don't even need a signature to form a binding contract. The signature is merely evidence that you were physically present and signed the document, since a signature is generally (if farcically) considered to be something only you can create. The contract that the signature is attached to is another evidentiary question, which is why some multi-page documents ask for a signature or at least initials on every page. Now, if the signature page you signed says, "I have read to and agree to Document X", that's evidence of... what it says, but there's still the very open question what are the contents of Document X, unless "X" is something like an SHA hash of a document, or a name and date/version of a document maintained by a well-trusted escrow agent.