Your grandma can comprehend but maybe don’t want to. We know humans are equipped with what’s needed to comprehend. Or maybe some humans might never comprehend some things and it raises the question : « does all humans have the same consciousness ? ».

My take is organic breathing = consciousness. There may be different levels of it. Otherwise it’s like trying to say all colors can be trimmed down to two values, black and white. There is a variety of consciousness and the definition we try to make of it orient the whole debate. It will never be the same between humans and animals but it doesn’t mean because it’s not human it doesn’t exists.