The example given on the page about Marco Polo a few things... 1. When a voyage starts and when a voyage ends are two different things. 2. As with most things

The example given on the page about Marco Polo a few things... 1. When a voyage starts and when a voyage ends are two different things. 2. As with most things in history nailing down when something actually happened is a range of values. You say he made it to China in 1271... but that's not fully accurate is it? It's a range of time in which he actually made it to China.