Ideas referred to anything my be true or falsea

"Whenever the mind refers any of its ideas to anything extraneous to them, they are then capable to be called true or false." This is true, but only to a certain extent. Locked doesn't take into account the state of being unsure. There are obviously times in life when you cannot deem something to be true or false, therefore the in between marker would be uncertainty. To deem something either true or false everytime your mind analyzes something is a ridiculous concept because sometimes we are not presented with enough evidence to ascertain a conclusion.