At present there is little evidence that these are the singular explicatives of the entrepreneur. It is likely that most, if not all, do apply equally to professional as well. Still, the implication is that the entrepreneur must surely require some or all of these constituents to be successful. Obviously some, including initiative in starting a venture, along with integrity, perseverance and self-confidence, are primary elements in the entrepreneurial personality. Without these features it is improbable that a new enterprise would see the light of day.