We have two examples of what “evidence” could mean here: mathematical proofs and physical events (things happening in a certain place at a certain time). You can study proofs. And you can study physics. There are hardly any arguments where these two different things are predictably interchangeable, so using the same word for them is a problem. Consider the statement “evidence exists”. Making it specific for our two examples, we get “proofs exist” and “physical events exist”. I’m not aware of a good use for these statements (it’s not at all clear what they could possibly mean).
We have two examples of what “evidence” could mean here: mathematical proofs and physical events (things happening in a certain place at a certain time). You can study proofs. And you can study physics. There are hardly any arguments where these two different things are predictably interchangeable, so using the same word for them is a problem. Consider the statement “evidence exists”. Making it specific for our two examples, we get “proofs exist” and “physical events exist”. I’m not aware of a good use for these statements (it’s not at all clear what they could possibly mean).