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选言证明
xuǎn yán zhèng míng
运用选言直言推理所作的证明。间接证明的一种。以论题为一个选言支,构造一个穷尽该问题一切可能的选言判断,并断定除该选言支外,其他选言支都是假的,从而断定论题是真的。如为了证明电灯突然熄灭是因为灯泡坏了,可以构造选言判断如下:“电灯突然熄灭,或者是因为停电,或者是因为保险丝烧断,或者是因为线路发生故障,或者是因为灯泡坏了。”然后根据事实断定前三个选言支为假,从而断定论题是真的。
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which procurement strategy will succeed
Which procurement strategy will succeed?
which produces ATP
which product is higher quality
which product is higher quality?
which professor grades the hardest
which professor grades the hardest?
which program are you watching
which program are you watching?
which programme can i take
which programme can i take?
Which programming language do you wish to use?
which quotients are infinite decimals
which quotients are infinite decimals?
which radio is his
which radio is his ?
Which ran fastest: a tiger
which ran fastest: a tiger,a dog or a cat
Which ran fastest: a tiger,a dog or a cat?
which reads slight buzz slight
which reason for its delaying
which reason for its delaying?
which refers to consciousness of the ideology
which refrigerator do you like
which refrigerator do you like?
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更新时间:2025/6/14 22:53:59