Table B.14.

Scale used for expressing the probability of a positive answer to the question addressed in Table B.12, after Mastrandrea et al. (2010)

Term	Probability of outcome
Virtually certain	99–100% probability
Very likely	90–100% probability
Likely	66–100% probability
As likely as not	33–66% probability
Unlikely	0–33% probability
Very unlikely	0–10% probability
Exceptionally unlikely	0–1% probability