Freedom to differ is not limited to things that do not matter mush. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order.
“We were thus led to organize ourselves, as men who had fought the war together, in order to support those statesmen who had truly understood the lessons of that World War, thus attempting to prevent its recurrence.”
“A new era in the physiological investigation of linguistic sounds was opened up by X-ray photography.”