When should I count a country?

Its up to you to decide when you have "visited" a country. If you didn't clear customs or leave the airport, have you really entered the country? Sorry, transits should not count. Did your train take you through Liechenstein on your journey from Salzburg to Zurich but you didn't actually get off? Sure, you visited it. But are you really comfortable counting it? Ultimately it's up to you.

Our rule?
Can you defend counting the country to your friends? If so, count it.