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Still, one of sentences suggests the stronger requirement: "[...] find out whether the cuboid has equal sides (= is a cube)".
EDIT: okay I see you updated it.
It doesn't say if it is a cube it says if it could be:
And that has already been mentioned here: https://www.codewars.com/kata/58d248c7012397a81800005c/discuss#642de3f56555a387e8795e45
Anyways, I've changed the description to replace
has
and=
forcould have
andcould be
.