Final answer:
The claim that Charles Evan Hughes was diagnosed with diabetes in 1920 is false. There is no widely available historical evidence to support this claim.
Step-by-step explanation:
The statement that Charles Evan Hughes, the U.S. Secretary of State in 1920, was diagnosed with diabetes in 1920 is false. Charles Evans Hughes served as the 11th Chief Justice of the United States (1930-1941) and was also the Secretary of State under Presidents Harding and Coolidge (1921-1925), but there is no public record or historical evidence widely available to confirm that he was diagnosed with diabetes in 1920. It's important to verify the authenticity of historical facts from reliable sources.