Does the head follow the heart in matters of truth?

[John V]

The above is not at all how formal logical fallacies work.  The problem with a formal logical fallacy is not the contents of the assertions - what one is willing to grant-  but the lack of a valid means of inference between them regardless of whats asserted or granted.  No matter what you fill the blanks with, an ad pop will still be an ad pop..and it's this fundamentally uninformative state of affairs that grants it the designation as a formal..rather than informal, logical fallacy. 

Wrong.
http://philosophy.lander.edu/logic/popular.html

The main problem with this fallacy is the mere fact that many people agree on something often does not imply that what they agree on is true; nevertheless, the fact that many people agree, can be relevant evidence for the truth in some instances, as shown below. The distinction is based on the nature of the relevance of the premisses to the conclusion.