The Impact of Labour 1920-1924. The Beginning of Modern British Politics (Cambridge University Press, 1971), p. 1.
“Our aim is not just to remove our uniquely incompetent Government from office—it is to destroy the socialist fallacies—indeed the whole fallacy of socialism—that the Labour Party exists to spread.”
Speech to Junior Carlton Club Political Council (4 May 1976) http://www.margaretthatcher.org/document/103017
Leader of the Opposition
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Margaret Thatcher 348
British stateswoman and politician 1925–2013Related quotes

“One of the grand fallacies of our time is that something beneficial should be subsidized.”
Cutting the Budget
1980s–1990s, Compassion Versus Guilt and Other Essays (1987)

The Historical Illuminatus as spoken by Sigismundo Celine
Context: The illusion of Sin and Guilt, the madness of our species, is the act of cursing the world under the misapprehension that one is cursing only one part of it. To curse the fig tree, as in the funniest and most misunderstood parable of Jesus, is to curse the soil in which it grew, the seed, the rains, the sun; the whole world, eventually — because no part is truly separate from the whole. The fallacy is that one can judge the part in isolation from the whole is "the Lie that all men believe."

“Fallacies do not cease to be fallacies because they become fashions.”
Illustrated London News (19 April 1930)

“The fallacy is to believe that under a dictatorial government you can be free inside.”
"As I Please," Tribune (28 April 1944) https://books.google.com/books?id=fCRLPIbLP8IC&lpg=PA132&dq=%22fallacy%20is%20to%20believe%20that%20under%20a%20dictatorial%22&pg=PA132#v=onepage&q=%22fallacy%20is%20to%20believe%20that%20under%20a%20dictatorial%22&f=false
"As I Please" (1943–1947)
Context: The fallacy is to believe that under a dictatorial government you can be free inside. Quite a number of people console themselves with this thought, now that totalitarianism in one form or another is visibly on the up-grade in every part of the world. Out in the street the loudspeakers bellow, the flags flutter from the rooftops, the police with their tommy-guns prowl to and fro, the face of the Leader, four feet wide, glares from every hoarding; but up in the attics the secret enemies of the regime can record their thoughts in perfect freedom—that is the idea, more or less.

“Where slavery exists, the republican theory becomes still more fallacious.”
Vices of the Political System of the United States http://press-pubs.uchicago.edu/founders/documents/a4_4s2.html (April 1787), Papers 9:350-51
1780s

Source: Free to Choose (1980), Ch. 1 "The Power of the Market", page 13
Context: The key insight of Adam Smith's Wealth of Nations is misleadingly simple: if an exchange between two parties is voluntary, it will not take place unless both believe they will benefit from it. Most economic fallacies derive from the neglect of this simple insight, from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another.

We must strive for unity at any price and with all sacrifices. But while we are uniting and organizing, we must rid ourselves of all foreign and antagonistic elements. What would one say of a general who in the enemy’s country sought to fill the ranks of his army with recruits from the ranks of the enemy? Would that not be the height of foolishness? Very well, to take into our army – which is an army for the class struggle and the class war – opponents, soldiers with aims and interests entirely opposite to our own, – that would be madness, that would be suicide.
No Compromise – No Political Trading (1899)