Mary hires David. The employment contract does not have an end date or a notice provision. David works for several years. On Monday morning, David says he likes rugby. Mary hates rugby and decides to fire David for his preference. She tells David his employment is terminated effective at the end of the day and he will be paid for work completed. Is this a valid termination of an employment contract?

No, because there was no just cause for termination

Yes, because Mary provided notice and paid for work completed

Yes, because Mary paid compensation in lieu of notice

No, because the notice was not reasonable and David was not given pay in lieu of it or fired for cause

Yes. Anyone can be terminated without notice as long as he is paid for work done.