> “Gibbons are actually not that good at tree swinging…” having done research in this area, i’m fairly confident in my assertion, but am open to any new inform

> “Gibbons are actually not that good at tree swinging…” having done research in this area, i’m fairly confident in my assertion, but am open to any new information/evidence you may provide. the rest of your statement provides one evolutionary mechanism by which gibbons became good brachiators, not evidence that they’re currently not.