I'm going to get specific on language here because I think it's important - everyone must look at the Appendix A:
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5445-applying-permanent-resident-card-card-first-application-replacement-renewal-change-gender-identifier.html#appendixA
Where you will find this: "Supporting documents showing that you meet the residency obligation
-You must provide copies of
2 pieces of evidence that can show residency in Canada in the five (5) years immediately before the application, such as: ..."
Note the
bolding is mine, for emphasis, and extra emphasis,
underlined.
The part I'm underlining: some of the documents they are asking for are EVIDENCE that CAN SHOW residency in Canada.
So I very much dislike IRCC's use of 'proof' here because it is very difficult to 'prove' (for example) one was actually physically resident for all the days you are counting towards residency (eg the days in between arrivals and departures).
But they don't (seem to) actually ask you to
prove all those days. They ask you to provide
supporting evidence of residency during this period (employment, student records, tax statements, social things like club or gym memberships, etc).
Notably, none of these things
directly prove residency. They are supporting, one might even say circumstantial, evidence of residency - the things one might accumulate while ... actually residing in a place.
@Ponga, not disagreeing with what you said, and - repeating - I hate the way they've used 'proof' in these documents. But when you look through, at least some of the evidence is just that - evidence that supports a case of having resided according to the dates one provides elswhere (travel dates).
So I hope people freak out a bit less, and look at what is requested. In particular, it does NOT seem that they are asking for eg full to-the-day employment records, or bank statements from every day in Canada, etc., etc., but ... evidence that supports you were here. Nor do they seem to ask for
complete records or evidence covering every day in Canada, just evidence that 'can support' or can show residency in Canada.
My guess or interpretation is that they think for most easy cases this evidence will support and make decision making a bit easier for the officer.
We'll just have to see though.