If something is arguable, there could be some disagreement about it.

It is arguable which way is quicker. 走哪条路更快，还没有定论。

it is possibly true that

It is arguable that the government has failed in this respect. 有理由说政府在这个方面失职了。

It is arguable that without his charm, the political group would not have achieved its high profile.

It is certainly arguable that this conviction may not be safe.

It is arguable that many of the team's leading players are past their prime.

While it is arguable that adults should be allowed to box if they are aware of the dangers, I believe the sport is unsuitable for under-18s.