An assumption is a description. Boy, have you ever graduated from a college?
Leave the above mistake alone, you may give a definition and see if I can turn it into an assumption.
I find it rather hilarious when you insult my education level, then you contradict your own assertion proving yourself wrong right afterwards..... If you can turn a definition into an assumption, that means it's not an assumption to begin with.
Anyways, while this may be college level stuff where you live, for people around where I live, this is grade 2 level. I'll be happy to bring your reading comprehension along by providing you with definitions for each word. It's the least I can do to help the poor and needy uneducated.
Definition:
1: a statement of the exact meaning of a word, especially in a dictionary.
2: the degree of distinctness in outline of an object, image, or sound, especially of an image in a photograph or on a screen.
Assumption:
1: a thing that is accepted as true or as certain to happen, without proof.
2: the action of taking or beginning to take power or responsibility.
3: the reception of the Virgin Mary bodily into heaven. This was formally declared a doctrine of the Roman Catholic Church in 1950.
Description:
1: a spoken or written representation or account of a person, object, or event.
2: a sort, kind, or class of people or things.
As you can see, they are totally separate words, each with different meanings. The flaw in your argument is that an assumption is a belief, not a description.