> The hypothetical case you describe where a cancer ends deadly in an average of 6 months for 90% of the population and is suddenly cured by a miracle treatment

> The hypothetical case you describe where a cancer ends deadly in an average of 6 months for 90% of the population and is suddenly cured by a miracle treatment simply does not happen That was an exaggeration (in line with the title of the article) - what I meant are cases where we historically have a good knowledge of the trajectory of an illness and this could be used as the control group.