You are researching the deductibility of a certain expense. You take the following steps:
Gather facts → Determine issue → Study the IRC → Review the related Treasury Regulations and determine that there is no regulation for the relevant Code provision → Examine the pertinent volumes of a topical reference service and find no helpful guidance.
How do you proceed? Are there additional steps remaining in the research process before you advise your client? If so, what are they? Why?