I understand it is a waste of time, but it does help me in understanding
the subject, thanks. However, in lieu of this code, can you explain to
me why a for ... in ... return ... loop does not work the same way and
always returns one? I.e., the following returns a sequence of ones,
instead of the expected 1 2 3:

for $elem in ../../day return position()

Or should I read this as the "position of the current element in the
current context, which is the same as current()/position and not the
position that $elem takes in the set of nodes ../../day".