We cannot have an expansive monetary policy, not because we voted for a restrictive policy, but because the European Central Bank makes the rules, even for member states outside the euro-zone.
We cannot write to ask a government minister or our MEP to propose a particular change in European law unless there happens to be a relevant proposal before the Council of Ministers and the European Parliament, because only the unelected European Commission has the right to propose new legislation.
We cannot refuse to have genetically modified organisms (GMOs) in our country because an EU directive says that, except under extremely limited conditions, we have to have them.
And we cannot elect a government on the basis of manifesto commitments to defend public ownership, propose democratising changes in the way European laws are made or keep GMOs out of our farms and food shops, unless that government proposes to withdraw from the EU.