To the Editor: Daniel Callahan is correct when, in “Rationing: Theory, Politics, and Passions”, he tells us that the combination of ever-rising medical costs and ever-increasing demand for expensive resources by physicians and their patients will—in the absence of any workable, generally acceptable mode of official rationing—lead to covert rationing. Or, more precisely, it will encourage us to extend the covert rationing that already exists, where those with more get more. As things stand now, this is unavoidable. However..