Discomfort is another word for tolerance

Steven Pinker to Harvard:

...[F]oreign to the mission of a university is the idea that students are to be protected from “discomfort” or so-called “microaggression” when they are exposed to beliefs that differ from theirs, or when the university does not accede to demands that it prosecute their moral and political crusades. Discomfort is another word for tolerance. It is the price we pay for living in a democracy and participating in the open exchange of ideas. ....