Final answer:
Overconfidence is NOT an aspect of the scientific attitude. The scientific attitude should include humility, curiosity, and skepticism, which foster open-mindedness and the search for truth, while overconfidence can hinder this process.
Step-by-step explanation:
The aspect of the scientific attitude that is NOT part of its core is overconfidence. The scientific attitude includes virtues such as humility, which allows scientists to understand that there's always more to learn and that they can be wrong; curiosity, which drives the pursuit of new knowledge and discovery; and skepticism, which involves questioning and critical thinking rather than accepting claims at face value. Overconfidence, on the other hand, can close off the willingness to see alternative views or recognize mistakes, which impedes the process of scientific discovery and the application of the scientific method. A scientific attitude should therefore encourage humility, curiosity, and skepticism, while guarding against the pitfalls of overconfidence to maintain a clear view towards reaching a more accurate understanding, or getting closer to truth and knowledge.