The possibility that more information will change your recommended course of action is one that has to be weighed against the costs of acquiring more information, not a moral imperative. One can always find oneself in a situation where the evidence is stacked to deceive one. That doesn’t mean that before you put on your socks in the morning you ought to perform an exhaustive check to make sure that your sock drawer hasn’t been rigged to blow up the White House when opened.
The possibility that more information will change your recommended course of action is one that has to be weighed against the costs of acquiring more information, not a moral imperative. One can always find oneself in a situation where the evidence is stacked to deceive one. That doesn’t mean that before you put on your socks in the morning you ought to perform an exhaustive check to make sure that your sock drawer hasn’t been rigged to blow up the White House when opened.