Do we have conventional knowledge of the present?

I read the discussion between Bhavaviveka and Buddhapalita, and there's a reference to "no cognition" (anupalabdhi) of emptiness, as liberative, though I forget which one of the two were supporting it. e.g. Garfield and Westerhoff in *Madhyamaka and Yogacara*: > The cognition of the ultimate nature of things—their all being empty > of intrinsic nature—is nonconceptual because, there being nothing to > cognize, no cognition arises. Or Eckel in *To See the Buddha*: And obviously the heart sutra includes (emphasis mine): > No suffering, no origination, > > no stopping, no path, *no cognition*, > > also no attainment with nothing to attain. ---------- Does anyone say that there is "no cognition" of *the present*, either at all times, or that only this "no cognition" has conventional validity? Or, can we have conventional knowledge of the present?