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Invention and innovation: An introduction
Invention and innovation: An introduction

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4.1 An explanation

I will now elaborate on my answer from Exercise 1. I'm doing this because my internet search revealed more than I've written in the above answer, and to show that the invention of the telephone and its use by consumers is not as plain and simple as you may think. You were not expected to provide the kind of detail below and my search took much more than 1 hour.