Sort of. But you can't statically decide it. In fact, really the only way to do it is with a GC (or ref. counting, etc.). You can't know until runtime when a no

Sort of. But you can't statically decide it. In fact, really the only way to do it is with a GC (or ref. counting, etc.). You can't know until runtime when a node will need to be freed. And my point still stands. The GC allows you to do things you otherwise couldn't.