System, method and computer program product for prioritizing trial-and-error attempted corrections of bit/s, in a memory, in which logical bit levels are determined by thresholding voltage values using threshold/s, the method comprising ranking bits such that a first bit is ranked before a second bit, which is less likely than said first bit to be erroneous and sequentially attempting to correct the bits in order of the ranking, including attempting to correct the first bit before attempting to correct the second bit.