So all you'd need is to have dozens of people coming out with similar "Brexit is bad" arguments, regardless of their accuracy or credibility, as growing evidence to support a campaign to stay?
The weight of evidence as you call it is up for debate, a debate many inners choose to ignore. "It's been said, therefore it's true". Is there any skeptism in the In campaign anymore? Do you all believe at face value what they tell you? Can't you wait until people can provide a convincing counter arguement or do you demand a rebuttal to claims immediately? I'm listening to Gove's speech right now, and later i'll go over it and find out if what he's saying is feasible and accurate, regardless of the fact it serves my interest to leave, i'm not just going to accept that what he's saying is true, just as if in the next few weeks several promising 'leave' statements are made creating a weight of evidence that leaving is beneficial.
At the moment, from past experience and knowledge about the EU, i'm in favour of a leave vote. So far nothing the remain campaign has said has done enough to change my mind, rather makes me skeptical about what their true motives are about how forceful they are to wish to remain in and the rhetoric they are using which has an air of "join, or die" about it. Osbourne wants to remain, Cameron wants to remain, Corbyn, who for decades opposed Britain being in the Common Market, changed his tune. That should set alarm bells ringing, and not in the sense of the interest to remain, either.