Originally Posted by FrequentFlyer9000

Perhaps not the best example as it does not feature any stopovers on the way home. My example in my previous post is the best way to ask the question:

Let's say I want to go from BOS to ZAG. The only published routes I can find are through AMS or through CDG. Using stopover logic, only AMS or CDG can be used as a stopover on this leg.

Here is the question:

Let's say I make CDG a layover. There are flights from CDG thru PRG to ZAG. Since I have used CDG as a layover, can I now stopover in Prague since it is a published route between CDG and ZAG?

I think that is the clearest way to ask it. Apologies for my lack of clarity before. You can see how being allowed to do this kind of layover trick would greatly expand the possibilities for stopover cities on a trip.