I have been following the #stopcommoncore hashtag on Twitter to keep abreast of the debate that is growing across the country about whether states should continue to implement the Common Core State Standards (CCSS). One argument against the implementation of the CCSS that has been advanced on a number of occasions is the idea that a particular lesson aligned to the CCSS is evidence that the CCSS are bad. This argument is an example “affirming the consequent”, which is a logical fallacy. (more…)