After this point the country's future was uncertain and the Department for International Development (DfID) needed to be flexible in its approach, the MPs said - this should involve moving its focus away from building a viable state to more traditional aid projects.
But some europhile Conservatives, including Lord Heseltine, have warned that committing to a referendum at some point in the future on the outcome of an uncertain negotiating process was an "unnecessary gamble".
But as the thoughtful delegate knows very well, when voters are uncertain what Plaid Cymru's USP is - their unique selling point - they fare badly in elections.