A singular proposition makes a statement about a single thing.
1. London is a city.
2. Our galaxy is immense.
3. Jane got married last Saturday.
To represent such a statement symbolically, we need two symbols:
one for the subject and one for the predicate. It is conventional
to use capital letters for the predicate and lowercase letters for
the subject, with the predicate letter given first. Thus, the
statements above are symbolized as follows:
Singular statements can be combined into compound statements by
means of the usual connectives, and everything we learned about
the logic of connectives applies to such statements.