So–called environmentalists have argued that the proposed Golden Lake Development would interfere with bird–migration...

Emil-Kunkin on December 8, 2022

Hi, I think A is both a necessary and sufficient assumption, that said, let's look at its negation. If it were the case that the group had indeed opposed every proposal because they would have done harm to the environment, then the authors argument falls apart. There is no proof they are just anti progress if they did have a legitimate environmental justification for their opposition.