Sentence and proposition

* A Sentence is a grammatically complete string of words expressing a complete
thought. It is a grammatical unit of one or more words that expresses an independent
statement, question, request, command, exclamation, etc., and that typically has a
subject as well as a predicate, as in:

· Compare these language expressions:
1a. We walk in the park. (A complete sentence)
1b. our walk in the park. (Incomplete sentence)
1c. for us to walk in the park. (Incomplete sentence)

But all the three expressions have the same semantic content (i.e. the same
relation to an action or possible action performed in a certain place by two or
more people, one of whom is the writer or the speaker).

· The semantic content shared by the three expressions is a proposition.
* A Proposition is the content of a sentence that affirms or denies something and is
capable of being true or false
1. Is something abstract but meaningful.
2. Can be expressed in different sentences and in parts of sentences, perhaps with
differences of focus but always with the same basic meaning.

· The difference is grammatical not semantic:
1a. asserts something, makes a statement.
1b and 1c can be part of statements as in:
1b. We enjoyed our walk in the park.
1c. It’s not too late for us to walk in the park.
Both 1b and 1c do not make assertion by themselves.
A proposition can be expressed in different sentences: