Maxperson
Morkus from Orkus
You're both half right and half wrong. An obligation is more than just an expectation. For example, I can expect you to respond to this post all day and all night for the next 10 years, but you will be under absolutely no obligation to do so.I think you're incorrect about what 'obligation' means.
An obligation is an expectation, something you are 'obliged' to do. It isn't something you are forcibly prevented from not doing.
An obligation does have some force behind it. Not enough to forcibly make or prevent you from doing something, but enough to make you generally want to do it. For instance, when I worked for an employer, I was generally obligated to do what the employer asked me to do. The force behind it was the threat of termination, reduction in salary, or some other punishment that I wanted to avoid. It wasn't enough that I couldn't just say screw you to the boss and do whatever I wanted, but there was more force there than just an expectation.