A formula is valid if and only if it is true under every interpretation, and an argument form (or schema) is valid if and only if every argument of that logical form is valid.

The 6.30 p.m. version is the only valid one.

A valid XML document contains only elements that are defined in the DTD.

It also recommended that UNOPS enforce strict financial discipline with regard to project officers creating only valid obligations.

That remains valid.

It doesn't appear to be a valid disc image or a valid cue file.

Those recommendations are still valid.

Number of valid ballots 157

But, though this argument is valid in principle, economic models show that this risk has only a moderate effect on the best policy.

Each report shall contain information only on those Kyoto Protocol units valid for that commitment period.3 The SEF consists of six tables.

Meanwhile, the only part of the Constitutional Law on Neutrality of 1955 still fully valid is not to allow foreign military bases in Austria.

Para 2 of Section 310 (1) reads as Provided that only giving a female in marriage shall not be a valid Badal i Sulh .

didn't find any valid .deb archives

The specified contact is not valid

Is that slogan more valid now?

How long is a license valid?

Number of valid ballot papers 31

These agreements contain the Core Labour Standards as well but are only valid for the European plants of General Motors (Opel) and Ford of Europe.

File is not a valid .desktop file

Profile flag 'debug' is no longer valid.

That concern remains no less valid today.

Restoring growth in the short term while addressing debt problems in the medium and long term may well be the only valid response to the crisis.

Other measures to combat human trafficking include There are FIA posts at all airports and only passengers holding valid documents are allowed to board the aircraft.

That element of the story, incidentally, remains valid.

Those assertions are still relevant and valid today.

All secondary colour coded access cards will be valid only for the duration of the High level Plenary Meeting of the General Assembly, possibly during the general debate.

UNICEF will review its procedure for raising and verifying unliquidated obligations for programme supplies to ensure that only valid obligations are recognized at the end of the biennium.

There are valid arguments to made for either course.

Such an image may be less valid in Azerbaijan.

Polyglot, a program valid in more than one language.

Thus, the distinction is valid in a European context.

The goals that we established then are still valid.

We have heard no valid argument against that proposal.

Whatever deal Uruguay made with Washington, the fact remains that the prisoners released from Guantanamo have only been issued Uruguayan citizenship cards, which are not valid for foreign travel.

The increase occurred after a new law, valid only for 1992 and 1993, no longer required young men to present their objections to the military in a credible way.

Not only is there insufficient political will for an international force, but, more importantly, there are valid doubts about the feasibility and prospects for the success of such an operation.

Concerning the issue of abandonment of the family home being punished as though it were adultery, she said that was the case only if it happened without a valid reason.

It does not appear to be a valid ISO image

It does not seem to be a valid Brasero project

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At the blog, 5 q8, Forzaq8 asks a valid question

In addition, the entire body is a valid target area.

403.17 Client certificate has expired or is not yet valid.

If I testify about myself, my witness is not valid.

The goals of the United Nations Charter are still valid.