Don't think that caveat or condition is anyone's to give or impose. Or Accept. I think the question of independence will never be off the table, until it is either fulfilled or there is just no real appetite for it more organically.
I do agree, if one gets called and comes to nothing, there shouldn't be another one for ages. But as a natural and logical principle, not as a political position. A second no Should by all sense kill it, but then, didn't we all think that before Brexit!
As i've said before, don't particularly want this one either tbf, but there is a mandadate for it, and a will there by a population, so if it has to be then so be it.