Question

Describe a situation where scientific argumentation was used to evaluate the strength of a scientific claim. What were the alternative explanations considered, and how was the claim ultimately supported or refuted? in 3 sentences

Answer 1

In 1854 during the Broad Street cholera outbreak in London, physician John Snow used scientific argumentation to test his claim that cholera spread through contaminated water rather than by "miasma" (bad air). He considered alternative explanations—miasma theory, person-to-person or food-borne transmission—and gathered evidence by mapping cases, interviewing residents, and comparing illness rates among those who used the Broad Street pump versus those who did not. The tight cluster of cases around the pump and the decline in new cases after removing the pump handle supported Snow's waterborne hypothesis (later explained by Vibrio cholerae), thereby refuting miasma as the primary cause for that outbreak.