As has been explained to you *countless* times windows threads are used to emulate processes and those emulated processes are then used to emulate threads.

Perl threads (which has nothing to do with Windows) don't emulate threads. They may or may not be threads by your definition, but they definitely don't emulate threads.

If they don't have the properties of (your definition of) threads, then they don't emulate threads.

If they have the properties of (your definition of) threads, then they are threads, and thus can't emulate threads.