#13 - Emissions from automobiles that burn gasoline and

[Rachael Wilkenfeld]

It's the most common one you'll see, Aspen. You could also have examples like "the required."

The required score for students to pass is a 60%.

Here, the 60% is necessary, but is separated from the indicator "required." It's a bit of an awkward way to phrase things though, so it's less common than you see with "the only."

[AspenHerman]

It's the most common one you'll see, Aspen. You could also have examples like "the required."

The required score for students to pass is a 60%.

Here, the 60% is necessary, but is separated from the indicator "required." It's a bit of an awkward way to phrase things though, so it's less common than you see with "the only."

Thank you!

[lixiaylin]

I am trouble by the explanation of this answer because as stated in the book, the conclusion is a conditional statement.

"Therefore, the only effective way to reduce such emissions is to replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that creates fewer emission."

According to the book, this conditional statement can be drawn like this:

ERE: Effectively reduce emissions
Replace: Replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that creates fewer emission

ERE --------> Replace

Why is ERE the Sufficient condition and Replace the Necessary condition --IF "only" or "the only" introduce the Necessary condition, resulting in the conclusion to be diagramed this way:

Replace --------ERE

Please explained? Thank you for your time on this.

[Stephanie Oswalt]

I am trouble by the explanation of this answer because as stated in the book, the conclusion is a conditional statement.

"Therefore, the only effective way to reduce such emissions is to replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that creates fewer emission."

According to the book, this conditional statement can be drawn like this:

ERE: Effectively reduce emissions
Replace: Replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that creates fewer emission

ERE --------> Replace

Why is ERE the Sufficient condition and Replace the Necessary condition --IF "only" or "the only" introduce the Necessary condition, resulting in the conclusion to be diagramed this way:

Replace --------ERE

Please explained? Thank you for your time on this.

Hi lixiaylin,

Thanks for the post, and welcome to the forum! I have moved your post to the thread discussing this topic. Please review the discussion starting on page 1 of this thread viewtopic.php?f=674&t=2479, and let us know if this helps or if you have further questions.

Thanks!