I feel there is a difference between the phrases "do-able" and Bell-able"
Do-able means "yeah, I can do that." Bell-able refers to the moves/runs that only one of a certain level could do BEYOND the normal levels of a intermediate and seasoned traceur.
an example of this: Jump B. when Seb. and Kerbie are together and Seb. did some kind of difficult move and Kerbie said "I did not think that was possible" and Kerbie is a good traceur. Seb. just knew it was Bell-able.