What is colour? We think we know because we all experience it and it seems an intuitive phenomenon. However, colour is not the property of any object as we may believe; it is something created by mind.

What is time? We think we know because we all experience it and it seems an intuitive phenomenon. However, our sense perceptions are highly fallible and most pattern recognitions (read science) turn out to be approximations that get modified as time, ironically, progresses and more accurate patterns are noted.