Definitions of consistency:

• noun:   a harmonious uniformity or agreement among things or parts
• noun:   (logic) an attribute of a logical system that is so constituted that none of the propositions deducible from the axioms contradict one another
• noun:   the property of holding together and retaining its shape

  Example: "When the dough has enough consistency it is ready to bake"

• noun:   logical coherence and accordance with the facts

  Example: "A rambling argument that lacked any consistency"