Areas of the cortex located just behind the temples containing the neurons responsible for the sense of hearing and meaningful speech. Frontal Lobes Areas of the cortex located in the front and top of the brain, responsible for higher mental processes and decision making as well as the production of fluent speech.
As a practical matter, some might argue, if a filibuster is threatened and it takes 60 votes to end debate in the Senate, then it does take 60 votes to pass a bill. Nothing in the Constitution says that a three-fifths majority is necessary to pass ordinary legislation.
I'm on board with all of these items except for (c). The current reality of American politics is that cloture votes are, for all practical purposes, not mere procedural votes, they're votes on the bill itself. The current reality is that bills require 60 votes to pass the Senate. But in comments to the original post, Fallows says this: