came here to say this. I personally think "ascending" implies "monotonically increasing", but if the kata author disagrees that should at least be stated explicitly in the instructions

There is an issue in Clojure where it considers an array with the same number twice to be unsorted even if the array is in the correct order still. [2 2 5 7] expects no when code provides yes, ascending. Instructions provide no clear instruction to do with this and one would normally consider this to be sorted.