Corrected entry: When Columbus goes into the first shop he props a fire escape door open saying "rule 22: when in doubt know your way out". This action contradicts his own rules as given the situation he's just given entry to the building to anyone including zombies. This could also be a stupidity.
BaconIsMyBFF
29th Oct 2018
Correction: Bear in mind the first part of the rule: "When in doubt." He's talking specifically about when you enter a building and you are unsure if zombies are already inside. This doesn't contradict specifically any of Columbus' other rules. He explains that when entering an unknown location, it is best to have a clear exit planned in case you have to flee. In his mind, based on his experience, it is a good idea to leave a door slightly propped so it is easy to open (no door knobs, latches, or anything needed) in case you have to escape quickly. The risk of letting zombies in is outweighed by the benefits of having an easy, quick exit. Once he is certain the building is secure, he would then close the propped door.
BaconIsMyBFF