cer·e·brate 
(sĕrə-brāt′)
(sĕrə-brāt′)intr.v. cer·e·brat·ed, cer·e·brat·ing, cer·e·brates
To use the power of reason; think. See Synonyms at think.
[Back-formation from cerebration, act of thinking, from Latin cerebrum, brain; see CEREBRUM.]
cer′e·bration n.