Final answer:
John and Samantha's conflict illustrates a Dialectical Theory tension between certainty and uncertainty, where John seeks novelty while Samantha prefers their routine.
Step-by-step explanation:
John and Samantha are experiencing a tension between certainty and uncertainty. John is seeking a change, or uncertainty, by wanting to explore a new restaurant and a new bar, which represents a desire for novel experiences. On the other hand, Samantha prefers the known and predictable, or certainty, by suggesting they go to their usual spots. This scenario reflects a classic tension described in Dialectical Theory, where individuals in a relationship must balance the comfort of known routines with the excitement of new experiences.