No way to prove it, but that is perfectly in line with the gist of McCabe's testimony. If the FBI doesn't apply for a FISA warrant, none will issue.
Based on the way the issue is presented, we leap to the conclusion that the "issue/no issue" decision is for the judge, and depends on the contents of the dossier. But maybe the "issue/no issue" decision is earlier in the process, at the FBI/DOJ.
Wouldn’t the dossier taint any other evidence?