[icontrolyourworld]

An opinion is a view or judgment formed about something, not necessarily based on fact or knowledge. So an opinion can be true in part or full and same for false. It's all about how you perceive something and decide what you think about it.
Example: I like stepmania, it's a good game.

Some would agree or disagree with such a statement, people who disagree might have a perception about the game that makes it a bad game. Me stating that it's a good game is a statement that holds value as something that can be quantified true or false, but I've not provided sufficient information on why it is good.

This kind of opinion can be quantified a true and false statement, but they're not wrong because it will mostly be opinion based.