premise: The leader of the New Democratic Party should know that the science advisory board which I appointed some months ago, chaired by the distinguished Dr. Roberta Bondar and including 15 or 20 outstanding Canadian scientists, is now doing an audit of the science capacity of Health Canada.
hypothesis: There could be 17 canadian scientists on the board
reason: This is false. It says there is 15 or 20 specifically, not between 15 and 20