EXPERIMENT: An operation or procedure carried out under controlled conditions in order to discover an unknown effect or law, to test or establish a hypothesis, or to illustrate a known law.

HYPOTHESIS: A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

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That reminds me of the remark by Carl Heneghan in The Times back in 2019

'Carl Heneghan, director of the Centre of Evidence-based Medicine at the University of Oxford, said: "Given paucity of evidence, the off-label use of drugs [for outcomes not covered by the medicine’s licence] in gender dysphoria treatment largely means an unregulated live experiment on children".'

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