The crucial point is not about statistics, but the narrative and logic of the campaign.
Nearly 80 per cent of party members want a public vote – Jeremy Corbyn must not let them down.
As the left consolidates its grip on the leadership, it will be tempted to centralise and to undermine internal democracy.
Some in Labour appear set on a character assassination of its biggest new support base – young, socially liberal Remainers.
Meanwhile, the new centrist party is real and it is forming.
The French president’s agenda of tax cuts and privatisation is actively corrosive to the progressive dream of Europe.
The Labour leadership’s real test will be how it addresses the deeper political culture that allows anti-Semitism to thrive.
The Labour leader is a passionate defender of migrants’ rights – Brexit shouldn’t distract the new left movement from that.
But will the party’s Brexit conundrums let her?
After all the bitter arguments, what is missing is a full blown strategy for doing things differently