Лекции по теоретической грамматике английского языка. Тивьяева И.В. - 115 стр.

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exciting, important, lucky, proud, regrettable, remarkable. The verbs to assume, to
believe, to imagine, to seem, to think and adjectives certain, eager, likely, possible,
sure are non-factive.
Factiveness as any other type of presupposition is important in the study of
English syntax as a factor influencing the syntactic form of the sentence and
determining the construction’s transformation potential. For example, Complex
Object with the infinitive can be used only after non-factive verbs of mental
activity.
Emotiveness
An emotive predicate expresses a subject emotional attitude of the author
towards what is being said that can be defined as corresponding or non-
corresponding to the speaker’s desires and expectations.
e.g. John knows that Mary got married. John regrets that Mary got married.
Emotive verbs include such verbs as to bother, to regret, to resent, to dislike,
to hate, etc.
Emotive predicates have some syntactic peculiarities that are absent in non-
emotive ones, for example, emotive verbs can be modified by the adverb much
while non-emotive verbs cannot.
So, the notion of presupposition allows systematizing and explaining some
semantic and syntactic peculiarities.
Implication and Inference
Presupposition is not the only type of indirect sentence meaning. Consider
the following example:
e.g. She somehow contrived to pass the exam.
The implied meaning of the sentence is that she passed the exam. However,
it differs from presupposition as it is negation-sensitive. An indirect proposition
inferred from the original utterance and dependent on negation is called
implication.
In mathematical logic, implication is a logical operation joining two
propositions into one by means of the logical connector “if… then”: “if A, then B”