Negation question

[voodoochild]

Experts,
If I say that "Not all of the politicians were not present at the event." Is this equivalent to "All politicians were present at the event"?

I don't think so because I could also say that some politicians were present at the party --- this is 180 of All politicians statetment.....

Can I say that "not all subject verb" is not equal to "all subject not verb"? However, I have seen that "No subject verb ..." does equal "Subject NOT verb ...." Example - No dogs were barking. This could be written as Dogs were not barking. Isn't it?

Please correct my understanding.

thanks

[Dave Killoran]

The two are not equivalent. The first statement is equivalent to "Some politicians were present at the event." while that could include All, it does not have to mean All.

In the case of "No As are Bs," that does indeed mean that "As are not Bs." That issue also came up in another question you asked today, over at http://forum.powerscore.com/lsat/viewto ... 9267#p9267.

However, "Not all As are Bs" is a different statement, and does not mean that A's are not Bs. It simply means that "Some As are not Bs."

Thanks!