Final answer:
In digital logic, pairs of NAND gates can be eliminated by applying De Morgan's Laws.
Step-by-step explanation:
In digital logic, a NAND gate is a universal gate, meaning that any Boolean function can be implemented using only NAND gates. However, in some cases, pairs of NAND gates can be eliminated by applying De Morgan's Laws. De Morgan's Laws states that the complement of a logical expression formed with NAND gates is the same as the expression obtained by changing all NAND gates to AND gates and inverting all input values.
So, if a pair of NAND gates are connected in series, you can eliminate them by changing them to AND gates connected in parallel, and inverting the input values.