annotate is a general mechanism
ellipsize is supposed to display at most 80 characters of the input
median of an even-length list is supposed to return the lower of the middle two
cdar is supposed to be missing
(type 3.0) is supposed to be an int (for now)
support for complex numbers is supposed to be in Arc
client-ip is supposed to be there (for now)
afn stands for "anaphoric function"
rfn stands for "recursive function"
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