Can a human eat an entire 12-lb roast turkey in an hour?
Rationale first then the answer.
A serving of roast turkey is about 1 pound of uncooked turkey. A 12-lb roast turkey would contain about 12 servings of cooked turkey meat. One human cannot eat 12 1-lb servings of turkey in one sitting.. The answer is: no.

Could Chuck Norris ride a horse?
Rationale first then the answer.
Chuck Norris is a person. Horses are bigger than people. People can ride horses.. The answer is: yes.

Could B be mistaken for an Arabic numeral?
Rationale first then the answer.
The letter 'B' resembles a figure-8 with a flattened left side. The Arabic numeral '8' is drawn as one large circle and a smaller circle immediately on top, intersecting each other. A 'figure-8' is a shape consisting of two intersecting circles, the larger on the bottom.. The answer is: yes.