Since there are no residence requirements in section 51e of the citizenship act "in order to assist the citizenship judeg in determining whether you meet the residence requirements under paragraph 5(1e) of the citizenship act," doesn't make sense.
This is about residence, not knowledge. They sent an RQ.
So, I would guess that this is a typo. I checked the new Citizenship Act to see if the section numbering changed, but it hasn't. So, either CIC made an error, it's a misprint or maybe you misread the letters?