An example of a historical scientific theory since discredited, which would now be considered an alternative conception:
"The section [of the 1831 medical jurisprudence course syllabus taught by Anthony Todd Thomson, Professor of Materia Medica and Therapeutics at the University of London] under 'septic poisons' demonstrates how areas of scientific knowledge were still languishing in the doldrums. 'Septic poisons' referred to 'marsh miasma and putrefying animal and vegetable matter'. The 'bad air' theory of disease would be challenged by scientists later in the nineteenth century."
Helen Barrell (2017) Fatal Evidence. Professor Alfred Swaine Taylor & the dawn of forensic science. Pen & Sword
