Such things don't exist in base nature, they only exist within human culture.

Also, there's more involved than just evidence, there is also the element of trust. If I believe myself to have reason to not trust a person or an organization, it will modify how I consider "the" evidence - the point of the quotation marks being that what is often referred to as "the" evidence is usually only a subset of all evidence, and typically seems to not take into consideration that what evidence exists is a function of what evidence was looked for, or discarded.