Which of the following is a formal definition? The rise of demagogues, which can be described as political leaders who come to power by stimulating the emotions of the people, threaten true democracies and leave political systems open to tyranny.

Writer H. L. Mencken offers an observant definition of a demagogue: "the demagogue is one who preaches doctrines he knows to be untrue to men he knows to be idiots."

Demagogues have become increasingly common in our current political climate. One contributing factor is the advent of social media websites. These sites enable "echo chambers" where facts are ignored and misguided ideas and opinions are amplified, allowing troublesome leaders to gain attention and power.

A demagogue (noun) is defined by Dictionary. com as "a person, especially an orator or political leader, who gains power and popularity by arousing the emotions, passions, and prejudices of the people."

She took up a scalpel and slit the monkey's abdomen, making a slow and gentle cut, keeping the blade well away from her gloved fingers. the spleen was puffed up and tough, leathery, like a globe of smoked salami. she did not see any bloody lesions inside this monkey. she had expected that the monkey's interior would be a lake of blood, but no, this monkey looked all right, it had not bled into itself. if the animal had died of ebola, this was not a clear case. she opened up the intestine. there was no blood inside it. the gut looked okay. then she examined the stomach. there she found a ring of bleeding spots at the junction between the stomach and the small intestine. this could be a sign of ebola, but it was not a clear sign. it could also be a sign of simian fever, not ebola. therefore, she could not confirm the presence of ebola virus in this animal based on a visual inspection of the internal organs during necropsy.