A very common argument against the fact of evolution is the claim that since we cannot observe evolution in practice it is no different than the concept of God, that one must have 'faith' in science in order to accept it. Now I am going to ignore the bit about faith in science as it refutes itself so no need to go on about that.

What I want to address is the claim that evolution cannot be observed, while this ia true when concerning one species evolving into another, I argue that we can absolutely observe evolution in practice if we look specifically and the underlying principle of evolution, that of changes occurring through genetic inheritance.

Note that this is not concerning the guiding factor of Natural Selection, but strictly changes from one generation to another by genetic inheritance. My example is overly simplistic for the pourpose of easy dissemination, so if I misrepresent evolution as a whole I ask for forgiveness, I will try my best to tie this into what evolution actually is but understand that my argument is only to demonstrate what I argue is the process of evolution in practice.

It is undisputed that when two parents reproduce, the child inherits genes from both parents, this creates very small changes in appearance between generations, while the child resembles their parents for the most part, difference in appearance do exist. Now add another generation to this, from grandparent to grandchild and the difference in appearance is a little more apparent. From this process of changes in appearance by genetic inheritance, from generation to generation, we see the underlying principle of evolution in practice and thus, on a very small scale, we can observe evolution in practice. If we continue to spread this out over millions of years, with subtle changes occurring through genetic inheritance compounded with time, and we get to a point where one species can be said to have evolved into another.
Thank you for your time.