Isn't science itself an assumption we've accepted as fact ?

Assumptions aren't a deal breaker for me. You don't "know" the laws of physics won't break down in the next few seconds and the universe will cease to exist. Even after you observe that the laws of physics didn't break down, how do you know you memories are not false? Perhaps your memories were of an alternate universe which you are no longer apart of. Of course these questions are absurd but they bring to light the irrationality of human thought and illusion of true knowledge. If we were perfectly rational we would not be able to make the inductive claim that since the laws of physics were one way for the past 14 billion years they will be the same for the next 14 billion years or next five seconds. We would, in fact, not be able to say that the universe even existed a second ago. Perhaps the universe started a second ago with all the evidence of the big bang and all the light from stars from billion of lightyears away already hitting the earth.

Of course evolved intelligence does not have such a high standard of knowledge. All we require is the constant connection of events. If I throw a rock into the air it comes back a hits me in the face. If I play with fire I get burnt. It is not irrational to think that maybe the 1001th time I throw the rock it won't come back. Because it is useful for me to think I "know" that the rock will come back I will always assume it will come back until it doesn't. We will assume that the laws of physics are universal throughout space and time until we observe otherwise. So scientific knowledge is simply useful assumptions that have not be proven wrong by some useful standard of wrong. So to respond to the statement: "Science doesn't make assumptions, it tests them", I would say false but the assumptions it makes are the most useful ones we can make.

this is false, science always makes assumptions that then are tested and end up beeing a theory..I really have a problem it is self evidence that science begins with assumptions,but again this is wrong by using I thing the wrong language what you mean by science doesnt make assumption , a theory starts with assumptions then tests this assumptions until they become a science paradigm. the definition given by the scientific method is well known ,any science is a science because it uses the scientific method . you can test assumptions by science ie.a method comming to be a science

Science makes assumptions all the time. The scientific method tests assumptions but those initial assumptions are made by scientists. Take Einstein for instance he assumed that nothing can travel faster than light and every other scientist for a few decades agreed with him even though they physically couldn't test it.

The scientific formula starts with a "Hypothesis". So technically speaking, it starts with an assumption, then tests it.

A hypothesis is based on knowledge gained from previous experiments.