A declarative sentence that is either true or false, but not both, is a proposition.
Also known as a statement.
Usually denoted using lowercase letters , , , or .
These sentences would be considered propositions:
- It is Monday today.
- I am 14 years old.
- 1 + 1 = 3
The truthfulnes or falsity of a proposition is called its Truth Value. Denoted by or , or 1 and 0 in computer science.