There’s a difference between contradictory preferences and time-inconsistent preferences. A rational agent can both want to live at least one more year and not want to live more than a hundred years, and this is not contradicted by the possibility that the agent’s preferences will have changed 99 years later, so that the agent then wants to live at least another year. Of course, the agent has an incentive to influence its future self to have the same preferences it does (ie so that 99 years later, it wants to die within a year), so that its preferences are more likely to get achieved.
There’s a difference between contradictory preferences and time-inconsistent preferences. A rational agent can both want to live at least one more year and not want to live more than a hundred years, and this is not contradicted by the possibility that the agent’s preferences will have changed 99 years later, so that the agent then wants to live at least another year. Of course, the agent has an incentive to influence its future self to have the same preferences it does (ie so that 99 years later, it wants to die within a year), so that its preferences are more likely to get achieved.