Informal Logical Fallacies in Marketing: Introduction

Unlike formal logical fallacies, you won’t need a pencil and paper to draw Venn diagrams to identify these torturers of logic. Nonetheless, it’s easy for them to fool us because, literally, there are hundreds (if not thousands) of them to be found on the Internet. With too many to memorize, our task to be good critical thinkers may seem insurmountable.

Not to worry.

All informal logical fallacies share one common property—they do not give you a good reason to accept someone’s argument. This is because informal logical fallacies either don’t give good evidence to accept an argument’s conclusion, or the evidence they do give is poor, misleading, or irrelevant. In place of good evidence, ...

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