mental microscope
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mental microscope


The principles set forth in the first of these papers lead, 
at once, to a method of reaching a clearness of thought of a 
far higher grade than the "distinctness" of the logicians. 
We have there found that the action of thought is excited by 
the irritation of doubt, and ceases when belief is attained; 
so that the production of belief is the sole function of thought. 
All these words, however, are too strong for my purpose. It 
is as if I had described the phenomena as they appear under 
a mental microscope. Doubt and Belief, as the words are commonly 
employed, relate to religious or other grave discussions. 
But here I use them to designate the starting of any question, 
no matter how small or how great, and the resolution of it. 
If, for instance, in a horse-car, I pull out my purse and 
find a five-cent nickel and five coppers, I decide, while 
my hand is going to the purse, in which way I will pay my 
fare. To call such a question Doubt, and my decision Belief, 
is certainly to use words very disproportionate to the 
occasion. 

http://www.marxists.org/reference/subject/philosophy/works/us/peirce.htm

http://www.marxists.org/reference/subject/philosophy/works/us/peirce.htm

http://www.marxists.org/reference/subject/philosophy/works/us/peirce.htm

http://www.marxists.org/reference/subject/philosophy/works/us/peirce.htm

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mental microscope