[BugsJustFindMe]

As mikequinlan said, you're so close and yet thinking about it completely backward. Not knowing enough about what the object is to know whether it's an obscured human (or a boulder that will total your car and leave you in the hospital) is all the reason you need to not hit it. You decide whether to hit a squirrel after you determine that hitting it won't ruin your day, not before. Not hitting something needs to be the default unless determined that it's safe to do otherwise.