common knowledge

It’s common knowledge, like water is wet, fire is hot, “Joker: Folie à Deux” is a terrible film.

All of this is, or should be, common knowledge as well.

Their respective history with arm injuries was common knowledge around the entire MLB.

It's common knowledge that poor-quality diets are considered major risk factors for many health issues and even noncommunicable diseases such as Type 2 diabetes.

The movie exists not to share undiscovered revelations, but to explain that the queer truth about nature has already been thoroughly documented — and encourage viewers to examine why this is not common knowledge.