16 OCTOBER 1959, Page 20

SIR,—The Seven Material Fallacies referred to by your correspondent Mr.

Matthew Lindsay are based on an Aristotelian classification and are as follow -(1) Fallacy of Accident, (2) Converse Fallacy of Acci- dent, (3) Irrelevant Conclusion or lgnoratio Elenchi, (4) Begging the Question or Petitio Principii, (5) Fal- lacy of the Consequent (really a form of (3)), t)) Fallacy of Causes or Non Sequitur, (7) Fallacy of Many Questions.—Yours faithfully,

J. S. WICARTIILIR

Hunispill Rectory, Highbridge, Somerset