Dear Professors at Hogwarts,
Please can you tell me if I am coming to hogwarts. How can I tell if I’m a witch? My parents and my brother are all muggles but I also think my cat is magical as well. How can I tell if this is true?
The mere fact that you have somehow divined the existence of a school of magic, despite being the child of two Muggles, should be answer enough. As for your cat… bring him or her to Hogwarts with you, when you come, and we’ll see.
Expecting you in September…
Hogwarts School of Witchcraft and Wizardry