Prof. Keralapuraji comment was in response to your post dated, Feb 5, 2022, below. This was your response to Prof. K - same as to Prasanth Neti, ji.
अस्य द्वैतेन्द्रजालस्य यदुपादानकारणम्।
अज्ञानं तदुपाश्रित्य ब्रह्मकारणमुच्यते।।
(BrihadAraNyaka BhAshya VArtika by SureshwarAchArya)
In this important shloka which is quoted by several AchAryAs of advaita tradition including NeelakaNtha, SureshwarAchArya states the following:-
The material cause of this magical duality is ajnAna. Brahman is said to be cause on account of the superimposition of that ajnAna (in Brahman).
The usage of the word material cause is significant. First of all, it clarifies the material nature of ajnAna. Just as world is triguNAtmaka, similarly its material cause ajnAna, is also triguNAtmaka. It is not asat like horns of hare. Further, being material cause, it is not immutable and hence it is not sat either.
Accordingly, the material cause of this magical duality is triguNAtmaka ajnAna which is neither sat nor asat.
AdhyAsa, being the kArya of ajnAna, cannot be material cause. It is an effect of its material cause ajnAna. Just as sometimes kArya is referred by kAraNa - adhyAsa is also called as ajnAna. For e.g. a jeweller can refer to his stock of ornaments in terms of kilos of gold. But that does not mean that gold and ornament are one and the same. Similarly one needs to understand in case of ajnAna and adhyAsa.
It is a remarkable shloka and due deliberation is needed on this