Series five of BBC TV's Dragons' Den has just finished, and anyone with a modicum of entrepreneurial spirit will have chanced a glance at the small screen to admire or admonish those who seek investment from the Dragons. TV entertainment it may be, but most weeks there are lessons to be learned from the experienced investors as they interrogate the hopeful and often hapless contestants. Never before has the making or breaking of business deals been made so accessible to the prime time viewer and raised so many questions about the nature of what constitutes a great investment.

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