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The authors of a recent paper [Phys. Rev. Lett. 113, 120404 (2014)] suggestthat "weak values are not inherently quantum but rather a purely statisticalfeature of pre- and postselection with disturbance". We argue that this claimis erroneous, since such values require averaging with distributions whichchange sign. This type of averaging arises naturally in quantum mechanics, butmay not occur in classical statistics.

A comment on the paper "How can a Result of a Single Coin Toss Turn Out to be 100 Heads" by C. Ferrie and J. Combes