namaskaram dyanaprajna ji :namaste
yes , emptiness of self identity , emptiness of aggregates ....but by acknowledging a seer (if I understand atanu's use of the word)...we are acknowledging that where sunyata is empty of self identity , empty of aggregates , ...it is full of all pervasive wisdom , inteligence , Buddhi
Actually Buddha instructed to steer clear of this line of reasoning.
Maha-punnama Sutta: The Great Full-moon Night Discourse
Saying, "Very good, lord," the monk... asked him a further question: "Knowing in what way, seeing in what way, is there with regard to this body endowed with consciousness, and with regard to all external signs no longer any I-making, or my-making, or obsession with conceit?"
"Monk, one sees any form whatsoever past, future, or present; internal or external; blatant or subtle; common or sublime; far or near every form, as it actually is with right discernment: 'This is not mine. This is not my self. This is not what I am.'
"One sees any feeling whatsoever... any perception whatsoever... any fabrications whatsoever...
"One sees any consciousness whatsoever past, future, or present; internal or external; blatant or subtle; common or sublime; far or near every consciousness as it actually is with right discernment: 'This is not mine. This is not my self. This is not what I am.'"
"Monk, knowing in this way, seeing in this way, there is with regard to this body endowed with consciousness, and with regard to all external signs no longer any I-making, or my-making, or obsession with conceit."
Now at that moment this line of thinking appeared in the awareness of a certain monk: "So form is not-self, feeling is not-self, perception is not-self, fabrications are not-self, consciousness is not-self. Then what self will be touched by the actions done by what is not-self?"
Then the Blessed One, realizing with his awareness the line of thinking in that monk's awareness, addressed the monks: "It's possible that a senseless person immersed in ignorance, overcome with craving might think that he could outsmart the Teacher's message in this way: 'So form is not-self, feeling is not-self, perception is not-self, fabrications are not-self, consciousness is not-self. Then what self will be touched by the actions done by what is not-self?' Now, monks, haven't I trained you in counter-questioning with regard to this & that topic here & there? What do you think Is form constant or inconstant?" "Inconstant, lord." "And is that which is inconstant easeful or stressful?" "Stressful, lord." "And is it fitting to regard what is inconstant, stressful, subject to change as: 'This is mine. This is my self. This is what I am'?"
I think I see what the problem is here. Buddha taught that asking "who is seeing?" is an invalid question, not be asked. He tossed out this entire technique as not leading to unbinding, but to leading to further propagation of aggregates, and not to try to get around this teaching. (I've posted a couple of suttas regarding this in this thread already.)
This is a major difference between Hindu dharma and Buddha dharma, as I see it, and why there is so much strife/misunderstanding regarding it, imo.