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<p>more detail, for every timestep of an execution trace of a <a href="page.php?w=non-deterministic_Turing_machine">non-deterministic Turing machine</a>, this tableau encodes the state of the Turing machine, its position in the tape, the contents of every tape cell, and which nondeterministic choice the machine makes at that step. A <a href="page.php?w=first-order_logic">first-order formula</a> can constrain this encoded information so that it describes a  valid execution trace, one in which the tape contents and Turing machine state and position</p><p>
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