source: [tag="PRP$"] □
destination: [tag="PRP$"] □ □
spec: It was an honest oversight but one which requires positive steps to remedy . If the following reasons are n't enticing enough to get you to visit for longer than an afternoon , then I hope my articles will at least challenge your mind-set about what US-Mexico border towns ( and la frontera in general ) are all about . Thus , definitions of agent causality are irrelevant to our arguments ; we are interested only in definitions of event causality , where the cause and effect are both events . What the Aztec records do is give us an insight into their mind-set .