Rick Hasen has twice posted in the last several days a sharp criticism of the President’s fifth anniversary statement about Citizens United. He objects to the assertion that Citizens United opened up the avenue for unlimited foreign corporate spending in the United States. Rick says this is false, citing in support of that position PolitFact’s prior rating of that statement as “mostly false,” which that fact-checking enterprise arrived at after originally rating the statement as “barely true.” And a review of PolitiFact’s analysis reveals that a statement merits criticism as “mostly false” if it is an ”overstatement.”

Readers will probably think very little is at stake in tracing the chain of reasoning from false to mostly false to barely true, or somewhat true, or whatever, and trying to sort out what fine differences distinguish one of these ratings from the others. But because Rick stakes out a strong position—that the statement is simply “false” —he should have a high degree of confidence that it is a black-and-white matter subject to no disagreement.