Many people find uncertainty unsettling and insist on definite answers to the large and small questions of life. Franklin was just the opposite, being of that less numerous tribe that finds certainty—or certitude, rather—unsettling. Doubtless this reflected, at least in part, his experience of the stifling certitude of the Mathers in Boston. It also reflected his wide, and ever-widening, reading, which exposed him to multiple viewpoints. Above all, it probably reflected something innate: an equipoise that nearly everyone who knew him noticed and that many remarked upon. It could make him seem
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