Final answer:
A memorandum used for tax research will not typically include a binding IRS confirmation letter, but it will contain assumptions made, recommended solutions, consulted references, and a statement of the issue.
Step-by-step explanation:
The question you've asked pertains to what would not be included in a memorandum or other form of communication used to report the results of tax research. Among the listed options, the one that would not typically be included is a letter from the IRS confirming that the research is accurate and binding. This is because while a memorandum will include any assumptions made, the solution recommended with supporting logic or reasoning, the references consulted during the research process, and a clear statement of the issue, it is highly unusual for tax research communications to contain a binding confirmation from the IRS.