The excuse is to admit that the activity itself is wrong, but the party denies that he should bear the responsibility. The defense is to admit that should be responsible for the activity, but the party denies that the activity is wrong. In the face of failed events, people use excuses to minimize their responsibilities, while  use defense  to try to redefine controversial actions so that they do not look too bad.
According to the above definition, which of the following is an defense?
Xiao Li lost a business and caused a certain loss to the company. He said it was caused by his leg injury being half an hour late