Spotting an INTP (Introverted, Intuitive, Thinking, Perceiving) can be challenging as they often blend in with the crowd due to their introverted nature. However, there are several key characteristics that can help you identify an INTP:

1. Introversion: INTPs are typically reserved and prefer spending time alone or with a small group of close friends. They may appear quiet, thoughtful, and introspective, often lost in their own world of ideas and thoughts.

2. Intuition: INTPs are highly intuitive and tend to focus on the big picture rather than getting caught up in details. They are often seen as abstract thinkers, constantly seeking patterns and connections in the world around them.

3. Thinking: INTPs are logical and analytical thinkers. They value rationality and objective reasoning, often approaching problems with a detached and impersonal perspective. They enjoy intellectual debates and discussions.

4. Perceiving: INTPs have a preference for perceiving rather than judging. They are open-minded, adaptable, and flexible in their approach to life. They tend to resist strict schedules and prefer to keep their options open.

5. Curiosity and Knowledge: INTPs have a deep thirst for knowledge and are constantly seeking to understand the world around them. They enjoy exploring new ideas, theories, and concepts, often immersing themselves in various subjects.

6. Independent Thinking: INTPs are known for their independent and original thinking. They often challenge conventional wisdom and are not afraid to question authority or established norms. They value their autonomy and prefer to come to their own conclusions.

7. Problem-Solving Skills: INTPs excel in problem-solving due to their logical and analytical nature. They enjoy dissecting complex issues, finding innovative solutions, and exploring multiple possibilities before settling on a final answer.

8. Absent-Mindedness: INTPs can sometimes appear absent-minded or forgetful as they get lost in their thoughts. They may struggle with practical matters or mundane details, preferring to focus on more abstract and theoretical ideas.

9. Intellectual Humor: INTPs often have a dry and witty sense of humor. They enjoy wordplay, clever puns, and intellectual jokes that require a certain level of understanding to appreciate fully.

10. Unconventional Interests: INTPs tend to have unique and varied interests that may not align with mainstream trends. They may be drawn to niche hobbies, scientific pursuits, or intellectual pursuits that others may find unusual or obscure.

It's important to note that these characteristics are generalizations, and individuals may vary in their expression of personality traits. Additionally, it's always best to approach personality typing with an open mind and not make assumptions solely based on someone's behavior.