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An insightful argument for a linear relation between the entropy and the areaof a black hole was given by Bekenstein using only the energy-momentumdispersion relation, the uncertainty principle, and some properties ofclassical black holes. Recent analyses within String Theory and Loop QuantumGravity describe black-hole entropy in terms of a dominant contribution, whichindeed depends linearly on the area, and a leading log-area correction. Weargue that, by reversing the Bekenstein argument, the log-area correction canprovide insight on the energy-momentum dispersion relation and the uncertaintyprinciple of a quantum-gravity theory. As examples we consider theenergy-momentum dispersion relations that recently emerged in the Loop QuantumGravity literature and the Generalized Uncertainty Principle that is expectedto hold in String Theory.Comment: 7 pages, LaTex; this essay received an "honorable mention" in the  2004 Essay Competition of the Gravity Research Foundation; submitted to IJMPD  on 23 June 2004; published as Int.J.Mod.Phys.D13:2337-2343,200

A GLIMPSE AT THE FLAT-SPACETIME LIMIT OF QUANTUM GRAVITY USING THE BEKENSTEIN ARGUMENT IN REVERSE