The first bit reads as patronising condescension.
The last bit reads to lack any objectivity at all. I don't believe the Labour Party or anyone else expects the UK to accept whatever the EU position is utterly. I also think that anyone truly with that opinion is someone I'd rather not try logic with.
Well try your own logic and apply it to the Labour statement that they will not exit the EU without a trade deal
Let's not be fanciful - let's not introduce crazy / extreme stances that the EU could/would be able to make given the policy leaked from Labour today. Don't forget the EU do not want us to leave - they would much prefer all this went away. In an absolute ideal world for the EU we stay in and have less than we had before - such as rebates and opt-outs....
Ignore my logic - In your mind and applying your logic let the parties take turns:
1. UK turn - Policy announced that the UK will not leave the EU until it has a trade deal
2. EU turn - We are not even going to discuss any possible future trade deal until the UK settle the bill that we have calculated - £50bn - no forget that £100bn
3. UK turn - go on then - what is it?? can you even suggest any options - given the fact that you have already declared that you will not leave etc..
I am avoiding my logic, but I could give you a number of choices - if only we had not been daft enough to hand all the negotiating power to the EU by saying that we will not leave without a trade deal........................