Incidentally, for climate change, the IPCC reports do define the words they use to indicate degrees of confidence, similarly as RFCs use MUST, SHOULD to indicat

Incidentally, for climate change, the IPCC reports do define the words they use to indicate degrees of confidence, similarly as RFCs use MUST, SHOULD to indicate degrees of requirement. https://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch1s1-6.html https://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch1s1-6...