“In most circumstances, disease is not an inevitable outcome of a single event occurring at a point in time but generally a probabilistic result of many events, each impinging on the organism at separate times and each producing its own sequence of biological reactions. The sum total of these events produces sufficient discomfort to the person to be recognized as illness….
Although the ultimate tissue reaction that has clinical expression may be the same in different persons, suggesting a uniform illness and, by extension, a disease entity in its own right, each person nevertheless probably has a unique and separate illness by virtue of the probability that no one else has the same combination and permutation of antecedents and their time relations. In this sense, every disease consists of multiple diseases; in this sense, too, there are no diseases but only sick people.”
W. Jeffrey Fessel, MD
In this sense too, there are no disabilities but only physical life in relation to time. Taken this way disability is simply an analogy to the multiple dynamics of entropy, for which, at present there are no solutions.
Planet of the Blind 
Robert Murphy made a similar and eloquent comments on entropy in the Body Silent.
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