Each person's wisdom differs, so the conditions required for realization also differ.

When you hear a loud noise while dozing off, you suddenly understand that when hearing a sound, the ear consciousness discerns it first and the mind consciousness discerns it afterward. Whether this counts as genuine realization depends on the specific circumstances. Genuine realization requires sufficient, necessary, and convincing evidence—evidence capable of completely and thoroughly convincing the manas, so that no doubt remains. Everyone's wisdom differs, so the conditions needed for genuine realization also differ. For some people, a single piece of evidence or a single instance is enough; for others, even if all the evidence is given to them and they have witnessed countless instances, they still cannot be certain and cannot attain genuine realization.