Here is a map showing the Serpentine Lake in London. It is claimed that the Serpentine covers an area of \(40\) acres. How can you test this claim?
For a start, there is a question about what is meant by the “Serpentine Lake” in the claim. Technically the Serpentine is only the part to the east of the bridge. The other part of the lake is called the Long Water. How can we decide whether the claim is talking about the whole lake, or just the part to the east of the bridge?