Table 1

Factuality values.

Positive
Negative
Underspecified
Certain ct+ (factual) ct− (counterfactual) ctu (certain but unknown output) 
Probable pr+ (probable) pr− (not probable) [NA] 
Possible ps+ (possible) ps− (not certain) [NA] 
Underspecified [NA] [NA] uu (unknown or uncommitted) 
Positive
Negative
Underspecified
Certain ct+ (factual) ct− (counterfactual) ctu (certain but unknown output) 
Probable pr+ (probable) pr− (not probable) [NA] 
Possible ps+ (possible) ps− (not certain) [NA] 
Underspecified [NA] [NA] uu (unknown or uncommitted) 
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