One of my favorite quotes from Foundation applied to that very topic:
The analysis was the most difficult of the three by all odds. When Holk, after two days of steady work, succeeded in eliminating meaningless statements, vague gibberish, useless qualifications - in short, all the goo and dribble - he found he had nothing left. Everything cancelled out.Lord Dorwin, gentlemen, in five days of discussion didn't say one damned thing, and said it so you never noticed. ― Isaac Asimov, Foundation
Although now I would expect that the true, distilled meaning of a typical politician's speeches is not nothing but rather the exact opposite of what the words originally seem to mean.
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