Monica has decided she wants to begin walking one mile per day, with the goal of eventually walking 15 miles per week. However, she has found that she often chooses to stay home instead and eat snacks while watching TV. Her desire to eventually lose weight is motivated by reinforcement; her snack-eating behavior, which interferes with this goal, is governed by reinforcement

Hamlet's fourth soliloquy is probably his most famous one - "to be or not to be."it is rather different from his previous soliloquies because now he is contemplating something that didn't come up before - suicide. he is thinking whether it is worth it to fight to find his father's murderer when in the end all of them are going to die, so why not die sooner than later. he is contemplating if he should go on fighting or just kill himself and end it all, which is why this soliloquy in particular is rather depressing, hesitant, and gives a deeper insight into hamlet's madness.