[Right Wing Assault]

but I cannot know what it is to walk into battle like so many of you

Maybe you should talk to an Army recruiter. Maybe they will take you. It's worth a shot.

[CharlesWayneCT]

You make an excellent point. He said “I cannot know”, suggesting it was something that was out of his control.

The proper statement would have been “I do not know”, which would indicate it was a decision on his part that led to his inability to comprehend.

You say “I cannot know” when you are talking to a cancer survivor and you have not had cancer.