“…a sample size of one…”

Such thought experiments can be useful tools for exploring situations that can’t be studied in the laboratory. Occasionally, however, unfortunate accidents yield case studies: opportunities for researchers to study scenarios that can’t be experimentally induced for ethical reasons. Case studies have a sample size of one and no control group. But, as the neuroscientist V. S. Ramachandran has pointed out in Phantoms in the Brain (1998), it takes only one talking pig to prove that pigs can talk.

Source: Large Hadron Collider: What happened to the scientist who stuck his head inside a particle accelerator — Quartz

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