A portfolio manager is assessing a potential investment in a new technology startup. To determine the viability of the investment, the manager conducts a series of due diligence investigations that include analyzing the company's financial statements, understanding its business model, evaluating the competitive landscape, and assessing regulatory risks. However, the manager decides to forgo a thorough review of the startup's recent patent applications, believing that the startup’s existing patents are sufficient for the investment decision.
According to the CFA Institute Code of Ethics and Standards of Professional Conduct, which aspect of the manager's decision represents a lack of diligence in the investment analysis process?