 Equality also acts as a default in circumstances where, although people may indeed have unequal claims to whatever good is being distributed, we have no reliable way of identifying and measuring those claims. By sharing the good equally, we can at least ensure that every claim has been partially satisfied. Thus suppose we have limited supplies of a drug that can treat malaria, and a number of patients displaying symptoms of the disease, but lacking specialised medical knowledge we cannot tell whether one person’s condition is more serious than another’s; then by sharing out the drug equally, we can guarantee that each person at least receives the highest fraction of what they really need. Any other distribution must leave at least one person with less (this of course assumes that there is no threshold amount of the drug beneath which it is ineffective; if that assumption is wrong, justice under the stated conditions might require a lottery in which the chosen ones receive threshold-size doses).