“Any restrictions to freedom of expression will always open the door to possible others, because analogical reasoning can mount arguments showing why this or that class of objects is closely similar to those for which exceptions have been made.”
Source: Propaganda & The Ethics Of Persuasion (2002), Chapter Six, Freedom Of Expression, p. 230
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Randal Marlin 27
Canadian academic 1938Related quotes

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Context: We are accustomed to speak of ideas as reproduced, as passed from mind to mind, as similar or dissimilar to one another, and, in short, as if they were substantial things; nor can any reasonable objection be raised to such expressions. But taking the word "idea" in the sense of an event in an individual consciousness, it is clear that an idea once past is gone forever, and any supposed recurrence of it is another idea. These two ideas are not present in the same state of consciousness, and therefore cannot possibly be compared.

Kant, Immanuel (1996), pages 181-182
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Source: 1850s, An Investigation of the Laws of Thought (1854), p. 6; As cited in: Leandro N. De Castro, Fernando J. Von Zuben, Recent Developments in Biologically Inspired Computing, Idea Group Inc (IGI), 2005 p. 236