Good question, let's assume that I have taken as many scnet precautions as possible, such as taking a scent free soap shower and proper washing and management of my hunting clothes and gear.
If it was me I could pull a hair off the game I was after. That close. I've had deer lay down right next to me, as long as I didn't move, they were clueless. Once I moved and had a deer dance in front of me for about 5 minutes. It must have thought it was bigger and badder than me, it was dark out.
Most people really don't take scent control very seriously, they think they do, but they don't.