What was unthinkable has moved well past the thinkable and is now on the table for discussion.

FORBES: Is It Time For Democrats To Dump Obama?

For the first time since the early 1980s, global slump is a thinkable, even plausible, outcome (see article).

ECONOMIST: Heading for meltdown?

These devices will be tuned to the specific needs of its owner with an un-thinkable amount of computing resources at its disposal.

FORBES: Intel Paves The Path Into The Post-PC Era

That would not be thinkable today: death cannot be imposed by the Yugoslav and Rwandan war crimes tribunals even for the worst atrocities.

ECONOMIST: The cruel and ever more unusual punishment

But after other deals, such as Travelers' merger with Citibank, not to mention Chase's earlier mergers, not only is it thinkable, it's been done.

FORBES: The Chase-J.P. Morgan Merger

Find the answer to that and the idea would be thinkable.

ECONOMIST: One world, one money

At this time of year, Mr. Jefferson would close his correspondence in words dry enough to be characteristic of him, yet somehow convivial enough to be thinkable in the mouth of Mr. Pickwick.

WSJ: Christopher Hitchens on Forced Merriment, the True Spirit of Christmas