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A comment on A monad is a monoid in the category of endofunctors, what’s the problem?. Parent comment

Re:A monad is a monoid in the category of endofunctors, what... by tprice7 on Sunday February 10, 2019 @04:18PM (#19130097)
Here's a fun puzzle: concretely, what is a group of groups?
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Re:A monad is a monoid in the category of endofunctors, what... by ginnungagap on Sunday February 10, 2019 @04:33PM (#19130187)
An Abelian group
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