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Elon Musk , the chief executive of Tesla Motors, has now responded in detail to the account of my test drive of his Model S electric car, using the company’s new East Coast Superchargers, that was published in The Times on Feb. 10. His broadest charge is that I consciously set out to sabotage the test. That is not so. I was delighted to receive the assignment to try out the company’s new East Coast Supercharger network and as I previously noted in no way anticipated – or deliberately caused – the troubles I encountered.