First of all, knowledge is not something we are sure that we know but is just something that we think we know and sometimes it is not always true. When we know something, we usually use the concept of areas of knowledge. They basically are the indicators that we use to apply to our knowledge. All types of areas of knowledge have different ways of thinking.
The certainty that differs across areas of knowledge is how much we believe that is true or believable. This is quite a great challenge to know and learn things that we know. Everything around us is not knowledge and it is something that leads us to get knowledge.
Natural science and Mathematics are the 2 areas of knowledge that I think they are the most related to each other because both of them rely on each other. If there was no mathematics there wouldn’t be natural science and if there was no natural science there wouldn’t be mathematics either. The example of natural science is “evolution” so how do we know that the evolution is accurate?? well, there are quite a lot of pieces of evidence that have been proved that all living organisms have been changed and evolved over time. For example, the fossil records, or even Darwin’s finches on Galapagos island that show the development of the beaks of the finches that have evolved in different places. And how is it related to mathematics? so normally when scientists need to prove something for example when they want to trace the ancestors of particular living organisms they need to use mathematics along with science.
Mathematics can also be one of the most important things here to discuss about. Mathematics is everywhere as well as natural science. Mathematic have been discovered many years ago. We usually know and believe in mathematics when it can be proved. We can prove literally every single thins in mathematics; because most of its concepts are based on reality and possibility.
In conclusion, Natural science and Mathematics are the 2 main areas of knowledge that I think can be related to each other. They both rely on each other.