ᐅ The Sun-Paul must consider only one thing: what is the relation of this or that external reaction of the animal to the phenomena of the external world? – Ivan Pavlov | QuotesTrue.com

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The Sun-Paul must consider only one thing: what is the relation of this or that external reaction of the animal to the phenomena of the external world?

Ivan Pavlov

"Scientific Study of So-Called Psychical Processes in the Higher Animals". Book by Ivan Pavlov, 1906.

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