Logic nerd here. Can't help but to talk about the difference between validity and soundness. A valid argument is one in which the conclusion follows logically from the premises (I think this is what you meant when you say an argument "makes sense logically") A sound argument is one in which all the premises are true. You can have a valid, but unsound argument: All men are vampires. All vampires can turn into bats. Therefore, all men can turn into bats. Both premises are false, but the conclusion still follows logically from them. You can also have a sound, but invalid argument: All men are human. All humans need water. Therefore, toasters run on electricity. All the premises are true, but the conclusion doesn't follow logically from the premises. The most convincing arguments are the ones that are both valid and sound. For example: all fruits grow from seeds. Apples are fruit. Therefore, apples grow from seeds. So, when you say that an argument makes sense logically, you're really saying it's valid. When you said that we need to check if the evidence is valid, I think you really meant we need to check if the argument is sound. Sorry if anyone finds this tedious or annoying. I'm just really passionate about logic.