If an elderly but distinguished scientist says that something is possible he is almost certainly right but if he says that it is impossible he is very probably wrong.

When a person tests positive for HIV it is not a test for the virus itself but for antibodies to the virus and the test is not able to distinguish between HIV antibodies and a multitude of other antibodies. Many conditions can lead to a false positive result including flu shots hepatitis and pregnancy.

By allowing the positive ions to pass through an electric field and thus giving them a certain velocity it is possible to distinguish them from the neutral stationary atoms.

The enemy is not just terrorism. It is the threat posed specifically by Islamist terrorism by Bin Ladin and others who draw on a long tradition of extreme intolerance within a minority strain of Islam that does not distinguish politics from religion and distorts both.

Conservative n: A statesman who is enamored of existing evils as distinguished from the Liberal who wishes to replace them with others.

I definitely wish to distinguish American poetry from British or other English language poetry.

I distinguish between nationalism and patriotism.

I think that's what distinguishes Schmidt really. In the movies now so much of what is appealing to an audience is the dramatic or has to do with science fiction and Schmidt is simply human. There's no melodrama there's no device It's just about a human being.

As soon as men decide that all means are permitted to fight an evil then their good becomes indistinguishable from the evil that they set out to destroy.

Without feelings of respect what is there to distinguish men from beasts?