Commentary: Syntax Is: NP1[agent] ASCERTAIN [proposition]
We use multiplication to ascertain the product of two numbers.
I want to ascertain whether she speaks French.
Chuck ascertained the pipe's pressure before opening the valve.
WordNet 3.0 Sense Numbers: 1, 3, 4
NOTE: Usually phrased as some sort of imperative.
Ascertain that the curtains are closed.
We must ascertain the good quality of our products.
Ascertain that dinner has been prepared.
WordNet 3.0 Sense Numbers: 2