People often use these terms interchangeably. As long as the rest of the context indicates which one is desired, it's easy to provide the correct advice.
Another entitled begpacker coming to Thailand. There are way too many of your types coming here these days. Arrogant know it alls (who don't actually know anything) with an incredible sense of entitlement.
Enjoy the Banh Mi and bia Hoi, Thailand doesn't have anything like it. Other than at Paul, Tops and some foreign owned bakeries and major hotels, the bread here is dreadful and the beer is even worse. Thankfully Beer Lao is widely available in Thailand and imported beer from other countries is also sold in major supermarkets.
Yes they can. Any immigration authority can demand you prove you meet their requirements for entry. Argue it out with them, you'll be denied very quickly if you don't meet their entry criteria.
Wow, what a pompous, arrogant liar you are. I have my visa, which I obtained in Taiwan. You're just an entitled and arrogant person, I hope you are denied a boarding pass or entry to Thailand or another country. With your attitude, you don't deserve to come here.