1. Lack of access to education: Some individuals may not have had the opportunity to receive a formal education, either due to limited resources or cultural barriers. This can result in a lack of knowledge and skills that are typically associated with intelligence.

2. Different learning styles: People have different ways of processing information and learning. Some individuals may have unconventional learning styles that are not recognized or valued in traditional education systems. This can lead to a perception of lower intelligence.

3. Cognitive disabilities or learning disorders: Certain individuals may have cognitive disabilities or learning disorders that affect their ability to learn and process information. These conditions, such as dyslexia or ADHD, can impact academic performance and may result in a perception of lower intelligence.

4. Lack of motivation or opportunity: It is possible that some individuals may not be motivated to learn or may not have been provided with opportunities to develop their cognitive abilities. This can result in a lack of knowledge and skills that may be associated with intelligence.

5. Sociocultural influences: Socioeconomic factors, cultural background, and societal expectations can all influence an individual's access to education and opportunities for intellectual development. These external factors can contribute to perceived differences in intelligence among individuals.

It is important to recognize that intelligence is a complex trait and cannot be fully assessed solely based on external appearances or performance in certain situations. Everyone has unique strengths and abilities, and it is important to consider the various factors that can influence someone's intelligence before making judgments or assumptions.