There is only one world, and the truest reality is in primary substances!
No! There are two worlds, and the truest reality are the forms!
Two of the wisest individuals of this generation were gathered on a gloomy day, as the rain engulfed them.
Form exists with or without our knowledge, and there are concepts of particular and superior form.
Gandalf and Dumbledore were having a quarrel regarding metaphysics and what they perceived to be the truest form of reality.
There are two worlds, the world of being and the world which includes eternal and unchanging forms. The world of becoming includes changing, temporary and sensible forms.
Their disagreement was conducted for hours as they could not come to a mutual conclusion. Gandalf used the philosophy of Aristotle to explain reality, whereas Dumbledore applied the principles of Plato.
The world is composed of substances such as form and matter, that can be explained in four causes; final, material, efficient and final cause.
Thus, Gandalf and Dumbledore decided to ponder on the similarities of the two ideologies and came to the definitive conclusion that both Aristotle and Dumbledore acknowledged that form did indeed exist.
What Dumbledore suggests is substance dualism of in his realm of the world. The theory of metaphysics, where Plato proposes that the world is comprised of two really distinct substances, each wholly independent of the other.
Thus, Gandalf and Aristotle believed that everything real in is forms and that they have always existed. Forms have different levels including lower and higher levels. Particular form can be a house, whereas, superior form can be circulatory or beauty.