I'm just curious about how you all might interpret this statement about adolescence (here defined as roughly between 12 and 20 years of age):

"Period of life from puberty to adulthood (roughly ages 12-20) characterized by...a progression from concrete to abstract thought." Britannica

I've omitted information about other indicators of adolescence. Here I'm more interested in what you categorize as strictly concrete and strictly abstract thought, especially as might be evidenced in the developing thought processes of adolescents.

Oh, and even if not applied to adolescents, what would you immediately categorize as concrete thoughts and abstract ones?