Conceptual art

Which means the idea is as or more important than the asthetic (how it looks).

For example chair

which tests this theory, showing an image of a chair, a physical chair and the definition of a chair.

Fluxus is a group of artist who did not have political plans, instead tried to basically make everyone chill and not be so serious so often.

The image or creation in your mind is suppose to be the most real while the physical aspect of it is false or a material possession, conceptual art is to treasure the memory of something instead of something for you to hold or touch.

Robert rouschenberg made a collar with the well known abstract expressionist William de kooning, after asking him if he could erase one of his work, kooning aloud him and gave him lots of choices and robert spent time choosing the hardest image to erase, and then erased it. this was to test the teary of if an action happened and were erased, would it still be a statement?

However conceptual art has been quite contradictory in a way as artists like Guy Debord and marcel Duchamp(even though Duchamps work was more Dada) wanted to show how foolish art was and how easy it was to create something, however in doing so they became artists and they have changed the outlook of what art can be.