Math and Science

If you have an empty bag, you put two apples in the bag, and then you put two pears in the bag - do you have to look in the bag to verify there are 4 pieces of fruit? In science, 2+2=4 is sufficient evidence to establish that there are 4 pieces of fruit in the bag - without even looking. Science uses math to establish the orbits of the planets and evolution of humans in the exact same way.