The "truth value" of a statement
is the true
-ness of that statement. If you can evaluate
something to be true
it has a truth value
6 > 5 ... has a truth value
6 > 7 ... has a truth value
5 ... has no truth value
because it cannot be evaluate
d any further.
You can also obtain truth values
for other kinds of statements such as "The sky is blue"