The answer is Moral Panic
Also called 'Public Fear', it is described as a collective Public anxiety or a feeling of threat towards a particular situation which they believe can completely destroy the society they live in.
In history, there has been several cases of Moral Panic starting from early times when e.g. the Japanese saw foreigners as a threat or when so-called witches were burned in Europe.
Recent moral panic examples include the threat of Communism, HIV as a 'gay' disease and the threat of Global warming.
In history, many governments have created 'Moral Panic' as a propaganda tool in wars and to deviate public perception.
On the day in 1775, George Washington, who would one day become the first American president, except an assignment to lead the continental army
Scientists should definitely use evidence - and they collect this evidence though especially designed experiments. Based on their data and assumptions they build models which they then test, but they can base their conclusions based on the models too.
What they should not do is based the conclusions on opinions, because opinions are not imparcial- they can state them as opinions, but not as conclusions.
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The girl tried to search for the old man who helped her, but she didn’t remember his look due to the heavy rain. She was roaming the streets with the umbrella, given by the old man, when she heard an old woman shouting.
"Thief! Catch him! He stole my purse!"
The thief was running towards her. Guided by her insincts, she hit the thief with her umbrella, which caught him off guard and allowed his capture. However, the umbrella gifted to her by the old man got broken. The girl frowned as the old woman she helped approached to thank her. The old woman saw a shimmering in the girl's eyes, as if she was holding back tears, and she followed the girl's gaze to the bent umbrella in her hands.
Seeing this the old woman spoke with a soft, compassionate tone, “Don’t worry little girl. I will mend this umbrella and return it to you."
"No thank you." The girl sighed softly, "If I may, I request that you should mend the umbrella and help someone else who needs it, should the occasion arise." She gave the old woman a smile and handed it to her.
The old woman mended that umbrella and always carried it with her, just in case.