Using true and TRUE in different languages may be a close second.
Dirk Eddelbuettel @eddelbuettel
10 Aug 2014
Forcing us to alternate between comment characters %, # and // may have been the biggest trick ever pulled by the Devil.

Dec 20, 2016 · 7:18 PM UTC

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Replying to @eddelbuettel
True, true, TRUE
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Replying to @eddelbuettel
Or T and TRUE in the same language
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