Question

The following import statement causes a conflict with foldr et al. because the first import statement seems to import all the functions in Data.Foldable into my module:

import Data.Foldable (Foldable (..))
import qualified Data.Foldable as Foldable (foldr, foldl, foldr1, foldl1, foldMap)

This import statement seems to work. However the Foldable class is now Foldable.Foldable:

import qualified Data.Foldable as Foldable (Foldable (..), foldr, foldl, foldr1, foldl1, foldMap)

Answer 1

The foldr etc. are class methods of Foldable, hence they’re imported unqualified by import Data.Foldable (Foldable(..)) in the first variant.
To only import the class unqualified, not its methods, use

import Data.Foldable (Foldable)
import qualified Data.Foldable as Foldable