Today’s healthcare environment very much resembles the River of Doubt in Brazil that former president Theodore Roosevelt explored in 1912, after his failed bid for a third term as President of the ...
insider.si.edu: River of doubt : Theodore Roosevelt's darkest journey / Candice Millard
Theodore Roosevelt had carried the lethal dose of morphine with him for years. He had taken it to the American West, to the African savanna and, finally, down the River of Doubt–a twisting tributary ...
The meaning of DOUBT is to call into question the truth of : to be uncertain or in doubt about.
DOUBT definition: 1. (a feeling of) not being certain about something, especially about how good or true it is: 2…. Learn more.
If you doubt someone or doubt their word, you think that they may not be telling the truth. No one directly involved with the case doubted him.
doubt (daʊt) n 1. uncertainty about the truth, fact, or existence of something (esp in the phrases in doubt, without doubt, beyond a shadow of doubt, etc)
uncertainty about the truth, fact, or existence of something (esp in the phrases in doubt, without doubt, beyond a shadow of doubt, etc) (often plural) lack of belief in or conviction about something: all her doubts about the project disappeared
When doubt and doubtful indicate strong uncertainty, the Usage Panel prefers whether and that over if.
In Scotland the archaic usage is still current but with a meaning broadened beyond worry: to doubt something is to consider it likely, so examples include not just "I doubt he's lying," but also "I doubt we'll arrive before dark."