Can I use the same board for meat and vegetables? I've heard that it's not good to use the same board for vegetables and meat, not only when you are making a salad but in general. Something about the bacteria in dirt and the bacteria in the meat is a bad mix.

But I'm wondering if you are making a stew of some sort, where you need to boil both meat and vegetables together, can I safely use the same board for both? 

I'm thinking since it will be cooked together anyways, what danger can there be?
I understand the intent of the advice to always keep meat and vegetable preparation tools and areas separate is to establish a habit, to avoid the possibility of cross contamination in cases where you are not going to be cooking the vegetables as much or at all; and similarly in a catering environment to be able to visibly demonstrate that working practices are such that cross contamination cannot occur.