We, as players, investigate (e.g. we declare actions that trigger Discern Realities rolls) -> We, as players, establish truths by making statements which do not contradict what is already known, and which follow the rules for the kinds of statements we can make -> We, as players, find out what the correct result is, assuming our efforts as players were successful
That second step, making statements, creates new truths where before there were neither truths nor falsehoods, as anything not yet established has no truth value.