Those who incline to very strictly utilitarian views may perhaps feel that the peculiar powers of the Analytical Engine bear upon questions of abstract and speculative science rather than upon those involving everyday and ordinary human interests.

I represented Wall Street, as a senator from New York, and I went to Wall Street in December of 2007 - before the big crash that we had - I basically said, 'Cut it out! Quit foreclosing on homes! Quit engaging in these kinds of speculative behaviors.'

We have little choice but to place a certain level of trust in scientists - even when it comes to the model-driven speculative discipline of climate change. And, need it be said, most scientists take great care in being honest, principled and precise.

There is more to be pondered in the grain and texture of life than traditional fiction allows. The work of essayists is vital precisely because it permits and encourages self-knowledge in a way that is less indirect than fiction, more open and speculative.

The Singaporean speculative tradition is different. Singapore doesn't conceive itself as the centre of the world or the one country that's going to save the world, so there's a different tone that comes out in the way speculative fiction is done. That's refreshing to read.

There's more to research than just looking up facts. Eventually, you have to make subjective calls. If you're writing a science fiction novel, there's probably some speculative technology in it. You'll have to decide how to project existing technology forward in a plausible way.

Until you separate the speculative behaviour of the financial sector from the real economy and the financing of the real economy, then we are not going to see the kind of stability or the capacity to drive genuine, income-led growth as opposed to debt-fuelled, speculative behaviour.

Some of the History Channel's documentaries involve docudrama segments and are highly speculative - but there seems, on the part of the producers, to be a real determination to get at the history behind our past - not the sex, which is left to drama shows and entertainment channels.

As a writer of fiction who deals with technology, I necessarily deal with the history of technology and the history of technologically induced social change. I roam up and down it in a kind of special way because I roam down it into history, which is invariably itself a speculative affair.

The best thing about writing speculative fiction is the opportunity to satirize the whole wide world. The America in 'A Better World' isn't ours, but it's pretty close, so I could lampoon everything from partisan politics to the cult of celebrity to our general disaffection. To me, all that is the point.

A single agency responsible for systemic risk would be accountable in a way that no regulator was in the run-up to the 2008 crisis. With access to all necessary information to monitor the markets, this regulator would have a better chance of identifying and limiting the impact of future speculative bubbles.

Sci-fi and horror, particularly, allow a storyteller to depart from, let's say, the demands of cinema verite or kitchen-sink realism or, even, just relatable dramas and can go into areas that are either - in the case of horror - more primally effective or, in the case of sci-fi, more speculative or imaginative.

We've been surrounded by images of space our whole lives, from the speculative images of science fiction to the inspirational visions of artists to the increasingly beautiful pictures made possible by complex technologies. But whilst we have an overwhelmingly vivid visual understanding of space, we have no sense of what space sounds like.

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