Logical thought requires the ability to test causal hypotheses in a systematic way, recognising which causal possibilities must be ruled out as well as which can be maintained in the light of the available causal evidence. This requires an appreciation of disconfirmatory as well as confirmatory evidence, and of what is causally relevant in a given situation.

We went along the hall to the end and up a flight of stairs with a carved handrail and newel post.

So when we landed in Rosedale that Saturday the 28th of June, we weren't in Toronto anymore, but only Grandma was over the rainbow to see us.

Walter declined the invitation, precisely because he wanted a dinner. He was, also, conscious that he had made a very bad bargain; but how could he chaffer and dispute about things so precious as the contents of those pages which were the very outpourings of his heart?