OK, now do this one:

Hey, hey, hey!  What, am I sick or something?  Well, yeah, I am.  But, that's another story.  Luckily, there is a much easier way to deal with this critter.

Let's look back at the ones we've already done:

See why it works?  If you understand this thing, then you'll always know when you can use it -- and when you can't!

Here's the official rule:

TRY IT:

Simplify