1. A circuit for use in a receiver, the circuit comprising: a plurality of branches, each one of the plurality of branches to receive the same input signal, and each one of the plurality of branches including: an adjustor to adjust an input of the adjustor by an offset; and decision circuitry downstream from the adjustor to convert an input of the decision circuitry to one of two possible output values; wherein the offset associated with at least one of the plurality of branches is selectable from a finite number of values, and the offset selected is to change during an operation of the circuit; the circuit further comprising selection circuitry coupled to an output of each of the plurality of branches, the selection circuitry to select the output of one of the plurality of branches as an offline value and to select the output of one or more other of the plurality of branches as a data decision value; and the selection circuitry further to change which output of the plurality of branches is selected as the offline value during the operation of the circuit such that each one of the plurality of branches has an output selected as the offline value at a respective different point in time during the operation of the circuit; wherein the circuit incorporates an adaptive decision feedback equalizer (DFE), and wherein the branch having the output selected as the offline value is an offline error computation branch; the circuit further comprising: comparison circuitry to compare the offset associated with the offline error computation branch to at least the data decision value to determine whether the offline value is erroneous.