So the text says that the more cholesterol the higher the risk of heart disease, but there are also other ways to get heart disease (lack of exercise), so saying that cholesterol is the principal or main cause is going a little too far.

Furthermore, let's pretend for a second that the text says that a high cholesterol is the ONLY way to cause fatal heart disease. The text is clear that heart disease kills more than any single cause but that does not mean that it is the principal cause of death because we don't that there isn't some combined cause (like heart disease and COVID) that could be the main cause of death.

Hope this helps!

I'm totally in. Will DM you.

I'm in!

Someone #help me here. I am hearing that A is not true because no where in the argument does it say that a given position is widely believed to be true. However, it does say this.

The very first sentence it says Antarctica has GENERALLY been thought to be covered in ice for 14 million years.

The conclusions that the ice MUST have melted 3 million years ago is directly dependent on that given position.

Why?

Because we are assuming the ice must've melted because we believe that it was frozen. The ice could not have melted had it not been frozen.

In a world where the general belief about a 14 million year frozen Antarctica isn't actually correct, we wouldn't be able to conclude that the ice had melted because we wouldn't know that it was already frozen.

I'm not seeing why this isn't a reasoning flaw.