That's highly dependent upon a person's perspective don't you think?
I believe that science is the only way to knowledge, you could argue that math is as well but I include math as a part of science.
There are other instances of knowledge outside of science to be sure, through literature or personal experience but these things are subject to different viewpoints and very different answers depending upon the person.
Admittedly I'm out of my depth when it comes to the philosophy of knowledge, what it truly boils down to and in what way all knowledge can be obtained (like through science) but this is my opinion.
I believe that science is the only way to knowledge, you could argue that math is as well but I include math as a part of science.
There are other instances of knowledge outside of science to be sure, through literature or personal experience but these things are subject to different viewpoints and very different answers depending upon the person.
Admittedly I'm out of my depth when it comes to the philosophy of knowledge, what it truly boils down to and in what way all knowledge can be obtained (like through science) but this is my opinion.