The following is respectfully quoted from “Perfect Conduct” with commentary by Dudjom Rinpoche:
4.b.3(b.11) Measuring the Dharma through logic:
The eleventh is intellectualizing the understanding of substantiality, lack of substantiality, and mental labels as truth.
This downfall occurs if one attempts to measure or realize uncontrived, fundamental nature of emptiness, with or without substance, only through conceptualizing intellect. Believing intellectual understanding to be absolute understanding, when it is only the measure of one’s own conceptualizations and mental limitations, constitutes the eleventh downfall.