Wikipedia

https://en.wikipedia.org/wiki/Beau%27s_lines

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Among potential examples of such unforeseen emergencies, legal scholars have listed kidnapping of the president and "political emergencies" such as impeachment. Traits such as unpopularity, incompetence, impeachable conduct, poor judgment, or laziness might not in themselves constitute inability, but should such traits "rise to a level where they prevented the President from carrying out his or her constitutional duties, they still might constitute an inability, even in the absence of a formal medical diagnosis." In addition, a president who already manifested disabling traits at the time he was elected is not thereby immunized from a declaration of inability.

Concept in Cartesian philosophy

"Halteres are a pair of small club-shaped organs on the body of some flying insects that provide information about body rotations during flight."

A Pyrrhic victory is a victory gained at such a cost to the victor that it is tantamount to defeat. The phrase references a statement attributed to Pyrrhus of Epirus. After his victory against the Romans in the Battle of Asculum in 279 BC, Plutarch reports that Pyrrhus exclaimed "One more victory over the Romans and we are completely done for!"

Feature of U.S. president Richard Nixon's foreign policy

Winner-takes-all voting systems tend to result in only two viable parties

Did you just look askance at some writing that uses an uncommon word, thinking, "I keep seeing this word... has it suddenly become popular?"

It could be the Frequency Illusion!