 In McCall 2012 one can find some results on testing the endorsement of connexive principles (AT′, BT, and BT stated as a rule) given by indicative conditionals in English in concrete form on a group of 89 non-expert philosophy students at McGill University in Canada. These findings support the intuition that laymen speakers of English subscribe to those connexive principles to a rather high degree: 88% in the case of AT′, 85% in the case of BT in rule form, and 84% in the case of BT.