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I don't think so. Conservative ethymologically means "preserve the current state". Hence the opposite would be pessimistic.

Another person mentioning that these are Farenheit units, makes it clear. There were publications in the 80s predicting much higher numbers and shorter timelines.

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Tempreture rises higher than 7 F degrees were the pessimistic least conservative estimates of the time.

Lower tempreture rises were conservative estimates based on "preserving the current levels of CO2" emissions.

I am indeed one of the "another person"s that mentioned these are F units.

Nah, a more optimistic prediction would already be "-2 to 5" degrees.

"Conservative" in this context relates to the method, not the outcome. You're still ignoring the range-characteristic of the outcome and talk like it was "5-7" degrees.

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