In "The Wasp Factory," the narrator expresses frustration by refusing to answer further questions, signaling a desire to disengage from the conversation. This moment emphasizes a conflict in communication, reflecting the character's internal struggles and resistance to probing inquiries. The action of taking the plate to the sink symbolizes a need to move on and leave behind what is unresolved.

The quote also touches on a broader theme regarding the metric system, suggesting that the character believes a transition to a more rational system could have been beneficial long ago. This remark can be interpreted as a commentary on the complexities and inefficiencies in current practices, paralleling the character's own chaotic life and thoughts.