overlearned
/ˌəʊvəˈləːnɪd/adjective
1Excessively learned or well-educated; too scholarly or academic.
2 Psychology and Education. That has been learned to a point where a response becomes instinctive.
Origin
Early 18th century; earliest use found in 3rd Earl of Shaftesbury (1671–1713), philosopher and author. From over- + learned.