That’s debatable, Linux (the kernel) does much more than communicate with hardware - it manages memory allocations, handles processes etc. GNU is a set of tools. While some tools are needed for the OS to even make sense (without tools it just sits there and does nothing), you could write a simple program used as the init process and nothing else than the program and Linux is needed. Which leads me to believe that the kernel is the OS.
That’s debatable, Linux (the kernel) does much more than communicate with hardware - it manages memory allocations, handles processes etc. GNU is a set of tools. While some tools are needed for the OS to even make sense (without tools it just sits there and does nothing), you could write a simple program used as the init process and nothing else than the program and Linux is needed. Which leads me to believe that the kernel is the OS.