Definition of Later-No-Help Criterion:
While making out your ballot, when you have voted for some candidates, you don't need to vote for additional candidates in order to fully help the candidates for whom you've already voted.
To vote for a candidate means to vote him/her over at least one other candidate.
To fully help a candidate means to vote in a way that does as much as possible toward making him/her win.
LNHe is about the absence of need for bottom-end strategy. For instance, many methods that fail LNHe have a strategy-need to rank unacceptable candidates in reverse order of winnability.
LNHe-complying methods have no need for any bottom-end strategy.
LNHe-complying methods' freedom from bottom-end strategy is reminiscent of and analogous to FBC complying methods' freedom from need for the top-end strategy of favorite-burial.