The Prelude module is imported automatically into all modules as if
by the statement `import Prelude', if and only if it is not imported
with an explicit import declaration. This provision for explicit
import allows values defined in the Prelude to be hidden from the
unqualified
The Report says (Section 5.3.1 of Haskell 1.4 Report):
The Prelude module is imported automatically into all modules as if
by the statement `import Prelude', if and only if it is not imported
with an explicit import declaration. This provision for explicit
import allows values defined in
