However, the citizenship grant is based on the criteria that 'The person' has taken an Oath to be a Canadian citizen. The presiding officer on your case decides what will be done.
You undoubtedly grasp the gist of what can influence the decision makers who determine whether to grant citizenship, that is the Processing Agent who does the more or less
grunt-work, compiling and evaluating all the relevant information and completing the File Preparation Template, and submitting the completed FPT with recommendations to the Citizenship Officer who makes the formal decision, or if the Citizenship Officer is not satisfied the applicant has sufficiently provided evidence to prove actual presence, ultimately a Citizenship Judge.
The sum and substance along the way can range from the rather simple cases (which is probably the majority), in which physical presence is largely based on the inference that the applicant was physically present in Canada between a known date of entry (typically confirmed by CBSA travel history) and the next reported date of exit. That is, all the days in-between entry-and-exit dates in the applicant's travel history count as days present in Canada.
If, however, IRCC has questions or concerns about the completeness of the
applicant's version of the travel history, IRCC will issue RQ and/or make a referral to CBSA's NSSD to conduct an investigation into the applicant's presence. Then, if the IRRC is not persuaded that the information and documentation submitted actually meets the burden to "
prove" the applicant actually was physically present in Canada all those days in-between entry-and-exit dates in the applicant's travel history, a Citizenship Officer can decline granting citizenship, which sends the case to a Citizenship Judge who conducts a fact-finding hearing, giving the applicant another opportunity to submit enough evidence to prove presence,
which is about proving the applicant actually was IN Canada all the days in-between entry-and-exit dates in the applicant's travel history. Even if the applicant ultimately prevails, that process can take several YEARS (especially now).
Historically there was a clear risk that living abroad after applying significantly increased not just the risk that IRCC (or CIC before the name change) would refer the application into RQ-related non-routine processing, but also the risk that IRCC/CIC would be more skeptical and strict in assessing the evidence of actual presence (or before that, under the OLD act residency-requirement, which by the way did NOT have any intent-to-reside requirement, in assessing actual residency in Canada). Few people can actually directly prove they were physically IN Canada a lot of the days they rely on to count, relying on an INFERENCE of presence based on a matrix of documents and evidence . . . like the applicant whose employer verifies she was present in Canada Monday to Friday working at a particular location in Canada, and who otherwise has a readily verifiable address in Canada, can safely rely on IRCC to INFER the applicant was also present in Canada on the weekends, the days in-between days for which there is direct actual proof of presence.
In any event, if and when IRCC challenges the applicant to more fully PROVE presence for all the days the applicant claims credit for being in Canada, that is a presence-case, and it can take a lot longer to process even if the Citizenship Officer is ultimately satisfied by the proof, but a lot, lot, lot longer if the case goes to a Citizenship Judge. And the outcome, whether a Citizenship Judge approves a grant of citizenship, will depend on the extent and quality of the applicant's evidence of actual presence all the days in-between entry-and-exit dates in the applicant's travel history, And again, historically there has been a clear correlation between living abroad and an increased RISK of this process.
This has little if any relationship to the brief (very brief) experiment with a provision requiring applicants to have an intent to CONTINUE residing in Canada, which was introduced in June 2015 and no longer applied by the end of that year when the Liberal government replaced Harper's (even though its formal, official repeal did not take place until 2017).
The potential risk of RQ and potentially becoming a presence-case, for SOME (again not all) applicants who are abroad after applying, is really a lot more to do with the widespread negative perception of applicants who are perceived to be
applying-on-the-way-the-airport, or perceived to be
seeking-a-passport-of-convenience, characterizations which tend to trigger vitriolic condemnation . . . which, however, is largely rooted in the fact that if and when perceived to be such an applicant, yeah, that evokes a strong negative impression which undoubtedly can colour how IRCC officials, and a Citizenship Judge, approach the case. And sure, there are morons who pretend otherwise, who should be ignored.
I do not mean to paint an entirely bleak prospect for the applicant who relocates abroad after applying. Even during the Harper years when such applicants were most emphatically subject to elevated scrutiny and tougher screening, many of those who relocated abroad still sailed through the process fairly smoothly. And there has been some signs that being abroad after applying is not so automatically perceived to be a negative factor now, in comparison to the past. But given the chaos in processing that Covid has caused, it is impossible to discern the extent to which the historically negative approach (which goes back to published
reasons-to-question-residency implemented by a Liberal government as far back as 2005) continues; the jury is still out, for example, on how being outside Canada after applying will SOMETIMES (not always) influence the process. My sense is that you are correct that applicant's perceived to have no intent to make Canada their permanent home are quite likely at greater risk. For obvious reasons (they were only given PR status, after all, on the basis of their intent to make Canada their PERMANENT home). But among those who are abroad after applying who will be dragged into a presence-case is very difficult to forecast. Some will. Some will not. That's why it is referred to as a "RISK."