Some people think they can explain rationally, by thought, what they think. But that is extremely relative... There is no ultimate Truth. The dialectic is an amusing mechanism which guides us / in a banal kind of way / to the opinions we had in the first place. Does anyone think that, by a minute refinement of logic, he has demonstrated the truth and established the correctness of these opinions? Logic imprisoned by the senses is an organic disease

'Dada manifesto', 1918