英语词汇“if and only if”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

if and only if

Used to introduce a condition which is necessary as well as sufficient: Alice will come if and only if Charles and Edward are both going to be there...

The problem is the formal definition of the logical constructs of if and only if, or sufficient and necessary conditions.
Preferences over probability gambles are rational, that is, satisfy the substitution and continuity conditions, if and only if they have the expected utility property.
We showed that in the absence of phase information, genotyping errors can be detected if and only if there is Mendelian inconsistency at one or more of the markers.

See parent entry: if

单词	if and only if
释义	if and only if Used to introduce a condition which is necessary as well as sufficient: Alice will come if and only if Charles and Edward are both going to be there... The problem is the formal definition of the logical constructs of if and only if, or sufficient and necessary conditions. Preferences over probability gambles are rational, that is, satisfy the substitution and continuity conditions, if and only if they have the expected utility property. We showed that in the absence of phase information, genotyping errors can be detected if and only if there is Mendelian inconsistency at one or more of the markers. See parent entry: if
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