If you say that it is arguable that something is true, you believe that it can be supported by evidence and that many people would agree with it. 可证实的; 可论证的
adjective [原级]无把握的,有疑问的;可论证的,有论据的
It is arguable that this was not as grave a handicap as it might appear. 有证据证明,这一残障不像看上去那么严重。