Remain is not just Labour. Anyway, generally speaking, Remainers go looking for data, facts and expert opinion. They will, far more often than not, accept data that contradicts their claims, and either update their position or drop spurious claims. I saw a conversation this morning where some were conceding part of the possible motive for Brexit being the EU anti-tax avoidance regs. Meanwhile Leavers generally continue to peddle exhaustively debunked claims (e.g. the "EU Army"). If I recall you've pushed that one yourself relatively recently. Nobody is "squeaky clean" but there's absolutely no equivalence of good faith here.