Introducing your easy "spotters" guide to things.
It's quite simple and it goes something like this.
If it's sort of roundish and looks rather like a splodge of paint, then it's one thing.
If it looks like a pair of miniature rubber gloves has been grafted onto a hairdryer attachment - then it's another.
In next week's class we'll learn about a tribe of Bolivian things who remained undetected
and untroubled by modern civilisation for several centuries, the impact of their being discovered
and the broader issue of indigenous things versus the modern world.