Rationality means to decide on the level of adequacy it must reasons is based on the relevant factors, as well as, regardless of the results that are expected to arise from the specific action that carefully.
The realistic means to decide on the level of self-sufficiency. Must be very realistic. By considering the factors involved, as well as taking into account the effects that are expected to arise from such actions carefully.
The realistic "means. The decision about the level of protection is simply. Must be reasonable. By considering the related factors and realize the anticipated results of it carefully