Yes the assumption is not taking the course and explained it it as it's me hehedo you assume that the applicant did not take the course ?
But consider this thread the real OP made here
"When i applied for my study visa after 12th grade i had 3 years study gap. So my agent covered that gap using a computer diploma. I am post ITA stage now but i am confused how do i mention that diploma in my profile"
Here OP didn't mention if it's a course he really did or not. Since OP said it's covered by using a computer diploma so i can only assume it was just a cover up : ))
But the real issue is the OP stated that course while applying for student visa , but they are doubtful now how to state it. If they ignore and hide it and at a later stage if IRCC finds then the case is different. Remember the agent covered OP's 3 year gap with a computer diploma.