Posted: Nov 06, 2017 11:32 am
by DavidMcC
Macdoc wrote:When you brain sees something that it thinks is food and it turns out a clever replica of food that's an illusion .... when my clients see what they think is an ordinary pair of boots sitting on the shelf and they turn out to be made of wood....that's an illusion.

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True, but what I am trying to say is that there are various classes of illusion, so it helps to be more specific than merely stating "it's an illusion".
In short, the word is too vague for use, unqualified, in a scientific context.