In the research of two-player zero-sum games, verifying whether there exists winning strategy has not been solved properly, since it refers to the search of the grand scale state space.

在对弈的研究中，验证对弈双方是否存在必胜策略的问题一直没能很好地解决，因为这涉及到超大规模的状态空间搜索。

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The university put him on a zero-tolerance policy in 2000 after an investigation into a former player's allegations that the coach had choked him during a practice.

WSJ: Rutgers fires basketball coach over abuse, taunts

Officials are being instructed to adopt zero tolerance to any player charging into a ruck or maul who is not bound to a team-mate as the laws require.

BBC: Zero tolerance on mauls and rucks