Editing Charles Sanders Peirce (section)

=== Early life ===
[[File:Charles Sanders Peirce's birthplace building.jpg|thumb|left|upright=1.25|Peirce's birthplace. Now part of [[Lesley University]]'s Graduate School of Arts and Social Sciences.]]
Peirce was born at 3 Phillips Place in [[Cambridge, Massachusetts]]. He was the son of Sarah Hunt Mills and [[Benjamin Peirce]], himself a professor of mathematics and [[astronomy]]  at [[Harvard University]].{{efn|Benjamin was one of the founders of [[linear algebra]].}} At age&nbsp;12, Charles read his older brother's copy of [[Richard Whately]]'s ''Elements of Logic'', then the leading English-language text on the subject. So began his lifelong fascination with logic and reasoning.<ref>Fisch, Max, "[http://www.iupui.edu/~peirce/writings/v1/v1intro.htm Introduction] {{Webarchive|url=https://web.archive.org/web/20181022143324/http://www.iupui.edu/~peirce/writings/v1/v1intro.htm |date=2018-10-22  }}", ''Writings of Charles S. Peirce'', 1:xvii, find phrase "One episode".</ref> 

He suffered from his late teens onward from a nervous condition then known as "facial neuralgia", which would today be diagnosed as [[trigeminal neuralgia]]. His biographer, Joseph Brent, says that when in the throes of its pain "he was, at first, almost stupefied, and then aloof, cold, depressed, extremely suspicious, impatient of the slightest crossing, and subject to violent outbursts of temper".<ref>{{Harvnb|Brent|1998|p=40}}</ref> Its consequences may have led to the social isolation of his later life.