I don't agree with this question. It says "almost impossible," NOT impossible. Given that it is ALMOST impossible, there is a possibility the TRex was alive when the marks were made. It does not mean the TRex had to be dead.

Can someone explain: Why is attacking the stilumus for not being an ideal experiment wrong? I thought that would weaken the argument.

I love this!

Why is "any" interpreted as "all" in E? The dictionary definition is "one or multiple things," so I think it should be taken at face value of meaning "one landfill." Anyone got an explanation? I appreciate it!

Got question 5 wrong, does anyone have a good explanation?

I thought that "legally purchase alcohol" was the sufficient and "21 or 21+" is the necessary. I also thought that "in the United States" is another sufficient condition.

It seems to me like if you can legally to purchase alcohol AND are in the united states, you MUST be 21+