'Void in initio' contract question

Here are the legal contract requirements (there must be an offer and an acceptance):
http://www.nolo.com/legal-encyclopedia/contracts-basics-33367.html

Thanks, but I don't understand how this addresses my question? Could you please explain? This just looks like the definition of a 'contract'

You wrote, "I signed an agreement with another party I now consider to be void, many elements of the written agreement did not reflect the situation we were agreeing to."

An offer and acceptance were made. You signed on the contract. What offer was not made? You call them "elements," but does any of those elements meet the definition of the offer?

If anyone goes into a store, and buys a product, a candy bar for example, that's the offer. If you paid for that candy bar, the contract is now complete.

If you go into the store, and you don't find anything you want, and walk out, there's no contract. The offer was made, but you didn't complete the contract by not buying the product.

what about the 'void contract' concept? the contract was based on an impossible act and/or event. one side knew this but one did not. There was no 'contractual capacity'

What a useless forum. I guess concepts and terms like 'void contracts', 'void in initio', 'unilateral mistake' and 'no contractual capacity' are too complex for you all; better to talk about candy bars.