I'll c/p the first post with new answers for case 4 & 5, so there's no confusion
Case #1 -
Not guilty. As much as this sounds like premeditated murder, the accused has not mentioned how they died or what he killed them with. No evidences mentioned which directly connects the accused to the victims; one of the victims so happened to kill the wife of the accused, so emotional and mental instability is plausible (which can be backed up in the statements of the accused - just because you thought of murdering someone does not mean you will/did commit to it.)
Case #2 -
Not a binding contract. eBay's bid policy mentions real estates and motor vehicles as a part of "non-binding." Therefore, it is a non-binding contract.
Case #3 -
Not obligated, non-binding contract. The definition of a binding contract is an agreement by
both sides and is legally obligated to be fulfilled
ONLY when the offers are the same as when confirmed - in this case, the agreement was a Toyota Prius XW20 for $10K. The seller came with a toy Yoda instead of the agreed Prius, and since there hasn't been any contracts signed or legal agreement, no need to fulfill your end of the deal and you can pull out any time - even if the Prius was offered on the scene.
Case #4 -
Yes, he's under a contract. Alexander was the first to send a letter with an offer, to which the US owner accepted and sent a response letter via express mail - in other word, this was a two-way agreement (Alexander working for the US company for 100k annually.) Doesn't matter if the rejection letter arrived or not (or ever), it won't nullify the offer agreement which arrived first. Alexander is in the fault for not opening the letter of acceptance.
Case #5 -
No, it's a voided contract. The waitress confirmed the party involved was intoxicated at the time. Agreements usually are required to be fulfilled, but can be voided if one of the parties involved stated that they were intoxicated, and in this case the witness (despite being busy with work) stated that they were drunk, therefore invalidating their written contract.