Where in ancient china was the compass concept important

The compass was important for the Chinese especially when they were at sea; it allowed them to travel until Saudi Arabia (and to closer places) without being lost at sea.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.

Carbon monoxide is usually more dangerous indoors.