@JazzMinnie,
Quote:Well it's worked so far hasn't it?
No, it, like every other prescriptive notion, hasn't worked, Minnie.
The OP asked because ESL/EFLs constantly come across uses that do not match the, largely, prescriptive teachings they have received. The problem with your aunt's test is that it is just a repetition of an ill-conceived notion.
Do you think that the rules governing a singular subject have to be the same as those that govern conjunctions?