Rule of thumb, assume nothing.
Yep, I assume animals don't have self-awareness. I can't tell what an animal is feeling, but I know it is not the same type of awareness as human,
How do you know this? What evidence do you have that proves this exactly? I think the mistake that has been made is thinking of awareness and self awareness by kind, instead of degree.
Comparatively, I'd say we know enough to claim that humans have a higher degree of self-awareness than other animals. This doesn't suggest all other animals have no self-awareness, just that the degree to which other animals are aware of themselves is lesser. A male silverback Gorilla is obviously aware that bodily, he is not his mate nor his offspring. A dog smelling out another dogs urine knows that it is not his urine, and proceeds to mark his own scent.
As for your use of the term "linguistic brains", this term is ultimately misleading, if used to suggest that only humans have language, syntax and grammar, when those things have been observed in species of birds, whales and dolphins. Even whale song has been found to have hierarchical structure in language, in which phrases are embedded in larger, recurring themes. At one point in time, it was thought that Hierarchical structure in language was unique to humans. This is not the case.
The linguistics of bird-song is also a place where we can find similarities to ourselves. Although both
birdsong and human language are hierarchically organized according to particular syntactic constraints, bird-song structure is best characterized as phonological
syntax, resembling aspects of human sound structure. Many species of birds share with humans a capacity for vocal learning, a crucial factor in speech acquisition.
There are shades of gray and not black-and-white differences between humans and other animals in cognitive abilities. While animals might not ponder life and death the way humans do, they still may have some sense of self.
Some people don't want to acknowledge the possibility of self-awareness in animals, because if they do, the borders between humans and other animals become blurred and their narrow, hierarchical, anthropocentric view of the world would be toppled.
My question for you now, even though you ignored a few of my questions in my previous comment; Why do you want to believe animals have no sense of self? Forget what you think you know, and focus on why you want to believe that. If you ignore this question I'll not bother to reply to your next response as I'll assume you aren't taking this seriously and just want to be right instead of wanting to have an open discussion.