In the proposed service, an investor can move from the recommendation to any important claim, assumption or combined conclusion and examine its sources. When background is unfamiliar, the companion follows learning prerequisites one topic at a time, then returns to the question. Together they consider conflicting evidence and alternatives. The investor can challenge a step, request further investigation, or discuss an improvement to an explanation or link. Agreed changes follow the applicable review and permission process, preserving what changed and why. This gives the investor a way to examine the reasoning; understanding it does not guarantee that the recommendation is correct.