WWI ended on the eleventh hour on the eleventh day of the eleventh month of 1918. The dickhead statesmen came up with this time to make it memorable. Do you know the hour that any other war ended? Unless it was tied to a mnemonic? If you do, shut down your computer and get some fresh air.

Sure, questions like the one about a lightest/heaviest wood is not so easy,but for a well educated person it should be of no issue

Are you trolling? I'd make an honest bet that less than 1 percent of people holding masters degrees could answer this. People would just guess (incorrectly) mahogany and get on with their non-trivial business. Hell, forget 1 percent. Less than .01 percent more likely. Harvard graduates can't even tell you why we have seasons.