A core challenge is to grasp your own subjectivity/qualia/mind. If you can grasp it then you can write it down in some form. But the tough part is that "graspin

A core challenge is to grasp your own subjectivity/qualia/mind. If you can grasp it then you can write it down in some form. But the tough part is that "grasping" is a thought production. So how can a specific thought production represent the whole functioning of thought? And if it's not a thought production how can it be 'understanding'? This is where the mystics come in, who present us with a different definition of "understanding" which doesn't involve thought productions, as in an intuitive "getting it". That may well be, but it's useless for science and engineering. So I think we're limited to speculation, which may well be fine.