Yes, I think we can all agree that bears, are almost as smart as some humans. They can recognize objects, and associate them with food. They can be resourcefull, and find a way if necessary to get at your food.

That being said, you have to be creative in how you hide your food, and store your food. If you got a bear canister, and the bear comes to the campsite just because it knows humans got food. It will find the food from its deductive reasoning using both sight and smell. If you hide your food in a bear canister, and that canister has the anti-odor, non-plastic bag inside of it. Then, use your creativity in hiding it. Don't let the bear find it. For some people,and some locations, that will be harder than for others. I wanted to have some avid campers try these bags out, and give some feedback as to the results. Effective field testing is the only way to determine how effective they are.