Questione giuridica chiave
Whether the complaint against the refusal to extend the residence permit was sufficiently reasoned for federal review.
Decisione estratta
The complaint did not meet the statutory reasoning requirements and could not be considered.
Motivazione estratta
The appellant failed to substantiate, with specific arguments, why the cantonal court's factual findings were arbitrary or legally erroneous; he merely repeated his own version of events and did not properly challenge the evidentiary assessment.