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Meaning and Purpose, written by Kenneth Walker, was first published in September 1944 by Jonathan Cape, London, and republished by Pelican Books in 1950.. The purpose of the book, as stated in the preface, was "... to examine critically those scientific theories of the last hundred years which have exerted a strong influence on our thinking, not so much for the purpose of assessing their worth ...
definition: is defined as metalanguage:= means "from now on, is defined to be another name for ." This is a statement in the metalanguage, not the object language. The notation may occasionally be seen in physics, meaning the same as :=.
In linguistics and grammar, a sentence is a linguistic expression, such as the English example "The quick brown fox jumps over the lazy dog."In traditional grammar, it is typically defined as a string of words that expresses a complete thought, or as a unit consisting of a subject and predicate.
Verbless clauses are comprised, semantically, of a predicand, expressed or not, and a verbless predicate. For example, the underlined string in [With the children so sick,] we've been at home a lot means the same thing as the clause the children are so sick. It attributes the predicate "so sick" to the predicand "the children".
The equality predicate (usually written '=') is also treated as a logical constant in many systems of logic. One of the fundamental questions in the philosophy of logic is "What is a logical constant?"; [1] that is, what special feature of certain constants makes them logical in nature? [2] Some symbols that are commonly treated as logical ...
In the most typical cases, the predicand corresponds to the subject of a clause, and the predicate corresponds to a verb phrase (VP) that is the head of the clause. But there are also form-meaning mismatches, where the predicand is not a subject or where the predicate is not the head of the clause. Also, not every utterance has a predicand.
The principal meaning of existential clauses is to refer to the existence of something or the presence of something in a particular place or time. For example, "There is a God" asserts the existence of a God, but "There is a pen on the desk" asserts the presence or existence of a pen in a particular place.
This is to say, for example, that the truth of the sentence "John is Greek and John is happy" is a function of the meaning of "and", and the truth values of the atomic sentences "John is Greek" and "John is happy". However, the truth or falsity of an atomic sentence is not a matter that is within the scope of logic itself, but rather whatever ...