I think you have to add "Joint" Parallel as a definition of two separate cores that collaborate on the same data at the same time - that requires concurrent memory/disc access. That Erlang can't provide BTW.

Or the same single threaded executable running as two processes on different cores/cpus - there is parallelism but no concurrency within any of the processes?

Still, different pieces of hardware execute the same instruction on different data. Think of this as data concurrency if you like.