confused with calculation for applying for Canadian citizen.?

Question

(1) What is the residence requirement?
To be eligible for Canadian citizenship, you must have lived in Canada for at least three years (1,095 days) out of the four years (1,460 days) preceding your application.

(2) Please note that you cannot meet the residence requirements for citizenship without a minimum of two (2) years as a permanent resident.

I understood (1) saying.
but I did not understand (2) ,
first, it mentioned that you have to live for 3 years out of 4 years, why here repeated this 2 years?
please give me an example, thank you.

Answer 1

You have to have lived in Canada for three years total out of the last four (in any legal status other than visitor). Two of those must have been as a permanent resident. So, if you've lived in Canada for five years, but for four of those you were a student and you've now been a permanent resident for one year, you've got a year left before you can apply for citizenship.

Answer 2

Live in Canada as long as you can so that you can apply for citizenship without question.