{Among his other accomplishments, Francis Bacon identified several widespread cognitive “idols,” each of which, he claimed, interfered with rational thought, thus limiting, and distorting, our understanding of reality.}
Richard Foster Jones, from Ancients and Moderns:
The Idols of the Tribe are those mental characteristics common to all men: proneness to suppose more order and regularity in the world than exist; the tendency of mental prepossessions to bend all things into conformity to themselves; and the influence which the will and affections, such as pride, hope, impatience, and the like have upon the mind, but particularly the part which desire plays in determining thought. The greatest hindrance to learning associated with the mind is the dullness, incompetency, and deception of the senses, which without the proper aids are infirm and erring, and instruments can do little to assist them. The defects inherent in the senses can be remedied only by the senses themselves assisted by experiments.
The Idols of the Cave, or of individual men, refer to the bias which education and environment impose on the variable and erratic spirit of man, and later are frequently cited as the reason for the obstinacy with which many men still cling to the past. The Idols of the Theater represent the circumscription of the mind by philosophical dogma and received systems, which represent nothing real in nature because they are based upon insufficient observations and experiments, as with Aristotle's philosophy, which Bacon calls sophistical, or are based upon too highly specialized fields of experimentation, as with the theories of the alchemists, which he calls empirical.
The Idols which Bacon considered the most troublesome of all, and which in his eyes had rendered philosophy sophistical and inactive were those of the Marketplace. These refer to the reaction of the understanding to words, and Bacon's recognition of them marks the beginning of a movement that is one of the characteristic features of early English science. Bacon believed that words filled the understanding with misapprehensions because, being invented to accommodate vulgar minds, they were defective. He cites as evidence the fact that when superior wits engage in argument the discussion often becomes a mere dispute over words. He did not have faith in definitions, because in natural and material matters, definitions consist only of words, which beget other words, and so the problem is not solved. The express fault which he finds with words is that they either represent things which do not exist in nature, or else convey very confused ideas of things. In short, language does not impart to the mind a true or accurate picture of material reality but fills it with more or less fantastic ideas of nature. 1
That he particularly had traditional philosophy in mind is revealed in the remedy proposed for this evil, namely, that all theories be dismissed, and recourse be had to individual instances or direct observations. He reveals the same linguistic attitude in his discussion of syllogistic logic. Syllogisms consist of propositions, and propositions of words, which in turn are only "marks of popular notions of things," so that if these notions have no relation (or only a confused one) to the material world, the whole logical edifice crumbles. This linguistic view had two marked effects upon later scientists. First, it determined the most consistent charge which they brought against the philosophy of the past, namely, that it was merely verbal, with no counterpart in reality; and second, it influenced them to consider a reformation in language and style as essential as one in science, to formulate their linguistic and stylistic ideals, and to try to make them operative.
Reason, or logic, says Bacon, has for so long been divorced from facts that it has fixed errors rather than discovered truth, and, therefore, the important step is to return to a purely sensuous knowledge of natural things, and from that foundation to work slowly upward, constantly guiding and controlling the mind by observations and experiments.
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1 Bacon’s mistrust of language and his preference for “individual instances” rather than abstract generalizations echoed William of Ockham’s nominalism. It also foreshadowed Ludwig Wittgenstein’s concerns with “the bewitchment of our intelligence by means of language.”
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