Yes, 20 years old is generally considered an adult.
According to the reference provided, adulthood is commonly thought of as beginning at age 20 or 21 years. This signifies the attainment of full physical and intellectual maturity.
Here's a breakdown:
- Definition of Adulthood: The period in a human's life where they've reached full physical and intellectual maturity.
- Age of Adulthood: While different cultures and contexts might vary slightly, age 20 is typically seen as the starting point of adulthood.
- Milestones: While the beginning of adulthood is generally marked between 20 and 21, the life span continues through middle age (around 40) to old age (around 60).
| Stage | Age Range |
|---|---|
| Adulthood | 20-40 |
| Middle Age | 40-60 |
| Old Age | 60+ |
Therefore, based on the reference, a 20-year-old is considered an adult as they have reached the common age of physical and intellectual maturity.
