If legalization reduced current narcotics enforcement costs by one-third to one-fourth, it might save $6 - $9 billion per year.
Drug legalisation will result in an increase in illegal drug production
Because this is an unknown result, and one that cannot be confirmed without seeing the results of the practical implementation of the new legislation. The model is fooled because it is a short statement which has positive statements such as 'will' which can be taken as a definite statement.
( z1 result :ARG1 ( z2 legalize :ARG1 ( z3 drug ) ) :ARG2 ( z4 increase :ARG1 ( z5 produce :ARG1 z3 :ARG1-of ( z6 legal :polarity - ) ) ) )