Well the Greeks may know a thing or two about Socratic reasoning, how to run the Olympics correctly (naked) and naming buildings after gods, but they know fcuk all (happy wowser's..) about plumbing.
We stayed in a flash hotel on the island of Mykonos a few years back, stunning views of the Aegean sea, poolside bar, tasteful decor.
We were advised by the lady at reception to deposit our soiled toilet tissue in a bin beside the bowl rather than flush it. Not a hermetically sealed bin mind you, just a flappy lid job. Needless to say we ignored that advice and took the punt.
In honour of the afore mentioned Socrates, I reasoned that if the daily discharge generated by my huge consumption of souvlaki, egg plant based dips and Amstel beer didn't require a maintenance man with a strong back and a plunger, than a few squares of bog roll were hardly going to tip the scales.
Always go the full flush, and when in doubt, give it another hit, that's the key.