Perhaps there is some confusion here about my use of the word intelligence. I'm talking about human level intelligence. Self-awareness, nor forethought are proof of human level intelligence. Chimps can look into a mirror and recognize it is themselves they see, and not another chimp. That is a test for self-awareness, but not human-level intelligence. Forethought would be a bit more difficult. I would be interested in exactly what tests you think prove human-level intelligence without the use of language.