actually both are beliefs. the opposite of a correct statement is a false statement, the opposite of an belief is another belief.
Nope.
A belief is:
something believed; an opinion or conviction: a belief that the earth is flat.
The opposite of a belief is a fact:
something that actually exists; reality; truth: Your fears have no basis in fact.
you fail to see the differences in the definitions: facts have to be true while beliefs dont necessarily have to be false, they just cant be proven.
"the earth is flat" is a false statement. "the earth is a not flat" is a correct statement.
"there is intelligent life on other planets" is a belief. "there is no intelligent life on other planets" is also a belief.
Sorry to ruin your belief with facts.
the only thing you are ruining is my optimistic belief in humanity...