Some philosophers of language believe some sentences despite of their predicative structure, haven’t ability of truth and falsity, because the speaker don’t means by these sentences describing the reality but means doing an action. These sentences are named speech acts. Before of philosophers ...
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Some philosophers of language believe some sentences despite of their predicative structure, haven’t ability of truth and falsity, because the speaker don’t means by these sentences describing the reality but means doing an action. These sentences are named speech acts. Before of philosophers of language, the muslims logicians regard to this point. They called these sentences by "pseudo-predication composition". Pseudo-predication composition was proposed in several problems. The first field of this innovation was the critique of the criteria of ability of truth or falsity of predicative sentences and the solving of liar paradox. Although the problem of speech act wasn’t developed in logic of Islamic period but the muslims logicians were discovered it. The study of muslims logicians' viewpoints about speech acts and comparing it with viewpoint of philosophers of language is very useful.
