I wish to perform some action which invites material risk upon myself and another person P, as well as inviting benefits. My personal evaluation is that the benefits far outweigh the risk, but the risk is both speculative and partially subjective so I decided to consult P before taking the action.
P was vigorously opposed to the action and gave his reasoning, a list of factors that he claims suggests the risk is much higher and the benefits much lower. Some of the factors given were of the inherently subjective variety, such as feeling proud of the current status quo.
Afterwards, I sat and thought about these factors and still reached my initial conclusion that the benefits far outweigh the risk. Furthermore, not only can I perform this action unilaterally but P will not even be aware I have performed this action unless one of the Bad Outcomes (which in my evaluation are exceeding unlikely) occur.
If the risk were greater than the benefit I would not take this action but P failed to convince me this is the case.
If my analysis is correct, with overwhelming probability not only will P be unharmed by my actions but also be entirely unaware of them. With this in mind, do I have a moral obligation to return to P and argue my case and obtain consent before performing my action?