对照英语当中的“if and only if···then”,有时会写作“iff···then.”当且仅当两个成分命题是同一真值,即要么都真,要么都假,这个组合命题的情况才会是真 现在,我们也许会立刻注意到,逻辑连词的真值功能和他们在英语当中的对应连接词各自并不是完全一样。 我们在5.3.2当中提到,反义词有很多种类。互补反...
The aim of this study was to test the predictions of the current theories of reasoning about the comprehension of conditional statements. We used two types of conditional statement that are logically equivalent: if p then q and p only if q. The model theory of reasoning considers that these ...
The meaning of IFF is if and only if —used in logic and mathematics. How to use iff in a sentence.
1(2019·天津高考)However, we can achieve meaning only if we have made a___(commit) to something larger than our own little egos(自我)。Ⅱ。 微短文改错(每句中最多2个错) 2However, we can achieve meaning only if we have made a (commit) to something larger than our own little egos(...
5.用语法知识破译长难句①However, we can achieve meaning only if we have made acommitment to some
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题目【题目】(2019·天津高考·D) However, we can achieve meaningonly if we have made a commitment to something largerthan our own little egos, whether to loved ones, to fellowhumans, to work, or to some moral concept.分析:句中引导条件状语从句,whether.or..连接并列成分,表示“ 相关知识点: ...
S is true if and only 16、if PS is a sentence. P is the set of conditions which guarantees the truth of S.e.g.: If “Peter is married.” is true.Conditions: there must be individual called Peter; there is a social institution called marriage; this individual is involved in this ...
if From Longman Dictionary of Contemporary English if1/ɪf/●●●S1W1conjunction 1used when talking about something that might happen or betrue, or might have happenedWe’ll stay at home if it rains.If you need money, I can lend you some.If I didn’t apologize, I’d feel guilty.If...
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