http://www.pbs.org/parents/childdevelopmenttracker/five/mathematics.html http://www.pbs.org/parents/childdevelopmenttracker/five/math... "At age five, some chi

http://www.pbs.org/parents/childdevelopmenttracker/five/mathematics.html http://www.pbs.org/parents/childdevelopmenttracker/five/math... "At age five, some children may still be gaining an understanding of the number words up to "four" (e.g., distinguishes one-four items from "many"; can identify collections of up to four items with a corresponding number; asks for up to "four" of something; knows age; can put out "one," "two," "three," or "four" items upon request)." So rather than setting a childs education backward and depress them with abstracts before nouns, when I read about it and understood the question at age 10 is was kinda a cool and interesting problem. That's if you want to take the ages and article seriously, which the OP was asking if the original was. It being more a thought piece I suspect.