How about we don’t ‘try this’ given that it is an idiotic scenario, suggested out of total ignorance.
The UK can withdraw Article 50 entirely unilaterally. The EU have no say in that decision - they cannot attach any such condition to our continued membership- and nor would they wish to. They...
Well there you go - missing the point completely (that these things are actually important decisions, to be given sensible consideration, rather than sticking your cross against the ones you think might be a bit of a laugh.)
All the smilies did help to make your response look a BIT more grown...