ought implies can

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Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003

9 Britannica Articles That Explain the Meaning of Life

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Colorful winter sunset

What's the Difference Between a Solstice and an Equinox?

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Stylish light blue jeans on wooden background, closeup of inset pocket

Why Do Jeans Have That Tiny Pocket?

New York city skyline aerial with the Empire State Building, New York City, New York.

13 Iconic Buildings to Visit in New York City

Panama Canal infographic

Timeline and Map of the Panama Canal

The Battle of Gettysburg, July 1-3, 1863. (Civil War, Pennsylvania)

9 Worst Generals in History

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

ought implies can: References & Edit History

Article Contributors

Primary Contributors

The Editors of Encyclopaedia Britannica

Other Encyclopedia Britannica Contributors

Article History

Type	Description	Contributor	Date
	Add new Web site: Yale Law School - Ought implies can and the principle of alternate possibilities.	Thinley Kalsang Bhutia	May 04, 2018
	Add new Web site: National Center for Biotechnology Information - PubMed Central - Does ought imply can?	Thinley Kalsang Bhutia	May 04, 2018
	New article added.	Brian Duignan	Sep 14, 2016