Probability is expectation founded upon partial knowledge. A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave nether room nor demand for a theory of probabilities.
George Boole

Property may be destroyed and money may lose its purchasing power; but, character, health, knowledge and good judgement will always be in demand under all conditions.
Roger Babson

Remember, while the work can sometimes appear to be simple to a viewer, the ability to perform expertly, consistently, precisely, over and over again, under pressure and on demand is what's needed.
Randy West

Research your idea. See if there's a demand. A lot of people have great ideas, but they don't know if there's a need for it. You also have to research your competition.
Magic Johnson

Revolutions demand enormous sacrifices and, at the same time, create a new need to change the world again.
Friedrich Durrenmatt

So many roles for women demand that you make the audience fall in love with you or sympathise with you.
Felicity Kendal

Society has always seemed to demand a little more from human beings than it will get in practice.
George Orwell

Some dreamers demand that scientists only discover things that can be used for good.
John Charles Polanyi

Sometimes you're in great demand. Then suddenly your career hits the breaks.
Gary Sinise

Strict justice would demand total confiscation of your property, personal imprisonment and fines.
Zebulon Pike

Such highly qualitative leadership is demanded especially in the realm of the fostering of right international relations. Here the demand is simply irresistible.
John Raleigh Mott

Supply always comes on the heels of demand.
Robert Collier

Supply and demand regulate architectural form.
Adolf Loos

Teach a parrot the terms "supply and demand" and you've got an economist.
Thomas Carlyle

The advocates of abortion on demand falsely assume two things: that women must suffer if the lives of unborn children are legally protected; and that women can only attain equality by having the legal option of destroying their innocent offspring in the womb.
Robert Casey

The American people demand results, not rhetoric, especially when it comes to national security issues.
J. D. Hayworth

The arts, as a reflection of human existence at its highest, have always and spontaneously lived up to this demand of plenitude. No mature style of art in any culture has ever been simple.
Rudolf Arnheim

The Asian nation's oil demand is expected to grow this year by 800,000 barrels per day and represents more than one-third of the total growth in global demand, according to the Energy Information Agency.
Gary Miller

The Connection Machines owned by the United States government laboratories were made available to me because they were considered impossible to program and there was no great demand for them at that time.
Philip Emeagwali

The constraints of melodrama can be a great blessing, because they demand that all the characters involved - as absurd and extreme as they may initially seem - must stay utterly rooted in their own reality, or the whole project collapses.
Stanley Tucci