You're correct, however, marioroy's point holds. When head has read its 4 lines it closes the pipe and effectively prevents cat (or type or copy etc.) from reading further.
(That doesn't stop it from be a Useless use of cat though.)
In reply to Re^6: Slicing the output of a command
by BrowserUk
in thread Slicing the output of a command
by fbicknel
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