It is not. Read s40 of IRPA, and the accompanying cases decided by federal courts. Only facts "material" to the application if concealed or omitted amounts to misrepresentation. The reason why PR applications and student visa applications ask for family members is not to know about the intent to immigrate or to evaluate ties to home country, rather to find if any of the family members are inadmissible and for security screening. At a later date when the applicant files his application for PR, or another family member files his / her application for PR, the entry of siblings and parents helps IRCC identify the family tree. If any member of the family is inadmissible, then the entire family is inadmissible (for PR).
@navinball When you claim that many applications in India are rejected because of this, can you show me the law, regulations or even a GCMS note which states that a person who is applying for a study permit and already has a relative in Canada amounts to his intention to immigrate and therefore has no family ties? On the contrary is your have a family member in Canada it supports your application as the person applicant can show financial support from the relative.
@canuck_in_uk since when did IRCC ask for SOP as a part of the study permit application? And even if an applicant writes something in SOP, it is not legally binding.
The issue here is about the person whose brother did not mention him in his study permit. This omission in no way impacts
@SGI 's application. And even when his brother applies, it will not be misrepresentation. inadmissibility for misrepresentation is "for directly or indirectly misrepresenting or withholding material facts relating to a relevant matter that induces or could induce an error in the administration of this Act"