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Re:Ask HN: What do you wish someone would build? by eterps on Saturday September 24, 2016 @05:11AM (#12570183)
An app that trains you to recognize logical fallacies and cognitive biases with suggestions on how to improve your thought process per case.
Re:Ask HN: What do you wish someone would build? by firezemissiles on Friday September 30, 2016 @05:59PM (#12615522)
There's the Center for Applied Rationality, as well as what the other replier replied.

rationality.org

Re:Ask HN: What do you wish someone would build? by clementangerine on Saturday September 24, 2016 @09:14AM (#12570799)
http://www.clearerthinking.org/ is pretty close to what you're looking for.