You're in a cabin and it is freezing cold. If you don't start a fire soon, you will surely die. You only have two flammable items for kindling. Which do you use to get the fire going: your country's flag or the only existing copy of an important book?

Both, if I have to. Though this is flawed; if I'm in a cabin and I have some way of starting a fire, I have ways of finding something else to use that'll burn better than either of those...

Have at it.