I believe that the proposed Rules of Thumb are too simple and vague, and therefore not adequate to the designated task.
I use a Rule of Thumb Houserule that produces a much more accurate result. I know that it's more accurate because...well...because I just know things (and Houserules are always better). This system is universal, and is equally accurate in all disagreements, not just 4E rules disagreements.
Step 1: Determine the age of the disagreeing parties. The older person is more likley to be correct because they are smarter, and younger people aren't...
Step 2: (used in case the disagreeing parties ages are the same, cannot be determined, or to further refine the accuracy of the projection) - Determine the "Join Date" of the disagreeing parties. The person with the oldest "Join Date" is more likely to be correct as they have probably read more threads and posts. (Also because those with a newer "Join Date", much like those with low post counts, are less likely to understand the intricacies of internet forum humor.)
Step 3: (used in case all of the above are the same, cannot be determined, or to further refine the accuracy of the projection) - Either determine the disagreeing parties likely primary language by finding the posters location, or tally up each posters spelling and grammar mistakes. Posters with English as their primary language, or the least amount of spelling and grammar mistakes, are almost always correct compared to those with a primary language other than English, or more spelling and grammar mistakes. Even if the poster has English as their primary language, if they are not posting from an English speaking country, they are considered to be out of practice, and therefore not as likely to be correct (and will probably have more spelling and grammar errors anyways). Exceptions: Some specific words, such as "p0wn" and "torphies", are not considered spelling mistakes. Any posts in another language, such as Klingon, are automatically considered to be completely inaccurate (unless it's a disagreement about the specific language).
Step 4: (used in case all of the above are the same, cannot be determined, or to further refine the accuracy of the projection) - Determine the alphabetical order of the parties screen names (using the English alphabet!). The accuracy of the poster is likely greater the higher the posters alphabetical order is (relative to the disagreeing parties).
Step 5: (used to further refine the accuracy of the projection) - Flip a coin to determine which rule to use next: Heads - Use
DEFCON 1's and
Jack99's Rules of Thumb; Tails - Flip a coin as a tie breaker (Heads - you're right; Tails - You're also right).
Step 6: (used if all else fails) - Ask
Piratecat or another moderator for a formal adjudication...(in which case they may or may not flip a coin)...
The above procedures will guarantee a minimum accuracy of 99.998765437%.
