Which term refers to the quality of having a ready insight into things?

The term that refers to the quality of having a ready insight into things is "perspicacity." This word describes a keen ability to notice and understand things that are not immediately obvious. It is often associated with intelligence and perceptiveness, allowing someone to grasp complex concepts or situations quickly. This quality is valuable in analytical thinking, problem-solving, and interpersonal communication, as it enables an individual to read between the lines and understand deeper meanings.

In contrast, the other terms do not convey this meaning. "Jocular" relates to being humorous or funny. "Jaded" describes a feeling of weariness or lack of enthusiasm, typically due to overexposure or fatigue with something. "Maudlin" refers to being overly sentimental or emotional, often in a way that is shallow or exaggerated. None of these terms capture the insightful and discerning quality that "perspicacity" embodies.