Question: In Haskell, For replicate function, why I have to write (Ord a, Num a) for type, rather than (Num a) or (Ord a) ? ===============================

In Haskell,

For replicate function, why I have to write (Ord a, Num a) for type, rather than (Num a) or (Ord a)?

===============================

replicate' :: (Ord a, Num a) => a -> a -> [a]

replicate' n x

| n <= 0 = []

| otherwise = x : replicate' (n - 1) x

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