Ok. Say timeout is one hour. Alice sends message to Bob saying attack. Bob acknowledges, Alice receives message at T+:10 minutes. Alice acknowledges, but Eve dr

Ok. Say timeout is one hour. Alice sends message to Bob saying attack. Bob acknowledges, Alice receives message at T+:10 minutes. Alice acknowledges, but Eve drops Alice's acknowledgement. Now, as far as Alice is concerned, both Alice and Bob acknowledged. However, Bob never got Alice's acknowledgement, so he won't attack.