Final answer:
Edwin's conceitedness and superior attitude can be termed as egotism, which indicates an excessive sense of self-importance and often neglect of others' viewpoints. This attitude is akin to egocentrism and shares similarities with the cognitive bias known as the Dunning-Kruger effect, where individuals overestimate their abilities.
Step-by-step explanation:
Readers acknowledge that Edwin is conceited and has a superior attitude. This can be termed as being egotistical or demonstrating egotism. Egotism refers to someone's excessive sense of self-importance, often accompanied by a lack of concern for others. This aligns with the definition of an egocentric individual, as described in the reference materials, which emphasises a person's preoccupation with their own perspective, to the point of neglecting other people's viewpoints.
In the context of the materials provided, it's also relevant to mention the Dunning-Kruger effect, which outlines a cognitive bias where people with limited knowledge or competence in a certain area overestimate their own abilities. While egotism is a broader term describing an inflated self-concept, the Dunning-Kruger effect specifically involves a misjudgment of one's skills and abilities.