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That was my point- there was already one control, so the large amount of repeated questions seemed excessive to me.
A few anomalous answers to control questions don't tell you anything. For example, maybe the person really has traveled north of the Artic circle (especially since this is an international site, there are probably people on this site from Northern Canada, or Scandanavia, or some other northern region) or really hasn't watched TV in the past three months (not everyone owns a TV, and if you don't own a TV, it wouldn't be hard to go three months without watching one). But the probability that the person really has done
all of those unusual things is pretty low.
Same with the inconsistency-catching questions. In some cases, trying to answer a question that is hard to apply to yourself (such as a preference question for two options you like equally) will result in seemingly inconsistent responses. In addition, a few questions may be accidentally answered inaccurately, because the person misread the question, was not paying attention, or had forgotten a relevant detail. So many people may have a few inconsistencies. But if you include enough consistency checks, you can distinguish normal mild inconsistency from the kind of inconsistency that would make the test invalid.