We want and need to have economic growth as that is the only way we know of to reduce population growth (quite apart from the fact that we also need it to abolish human poverty, something of a desirable goal).
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"We don't know who they were, we only know they were from St Austell and they called themselves a 'fast response unit' but they weren't employed by the council, " he said.
And manufactured exports, initially based on low wages, are the only route we know for rapid economic development.
If we invest only in what we know we become horrifically non-diversified.
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We really only know what we can remember at any given moment.
The only reason we know what they sound like is because the great composers of history scratched those notes into parchment with quill pens.
So far it is the only survey we know of to quantify and cogently aggregate product recall trends on what will be an ongoing basis.
But from skinny jeans to meggings, the only thing we know for sure (but not really) is that the world's collective sperm count is slowly being compromised in the name of men's fashion.
But only when we know more about the role of the governing body, the International Cycling Union, in the deception that now characterises the Armstrong years, can we have complete faith in the sport.
"We hope it is nothing worse than that and there is no break or ligament damage but we will only know when we get the results back from the hospital, " said the former Burnley manager.
We only know they are five skulls and some bones and we also don't know if the bones are monks from the abbey.
They not only know better than we do, they know better than all of us together do.
Only then will we know just how talented is the nation in which we live.
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Only then we will know across the board who showed skill and who was lucky.
"We only know the ones who are externally exhibiting symptoms, " says Ms. Sheridan.
But not only do we not know what it is, we don't even know who, or what, is conscious.
We only know so much about the situation in the Congo because the kind of communication that the mobile phone allows.
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And yet "we only know the tip of the iceberg, " says ecologist Benoit Fontaine of the National Museum of Natural History in Paris.
"In the real world there are countless circumstances where we only know a person by their pseudonym or by their public identity, " he said.
"Not only do we now know that there was widespread abuse by clergy, but more damaging was the way bishops systematically covered up that abuse, " he says.
Not only do we not know where we are going to be with swine flu in a few months time, we don't really know where we are.
Normally, we only know what things are worth by observation.
Arguably, without those concerts, the Southern Christian Leadership Conference would not have had the money to fight white supremacy, but we only know her as mother, wife and friend.
And while being bodies together is still the bedrock experience on which the others are built, having a relationship experience via SKYPE works only because we already know what it feels like to spend time together with another person.
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Now, anything else at this point is pure speculation, since we only know about Samsung's HSA membership from the appearance of its logo on a relevant slide at AMD's keynote speech at IFA, and there's no official word on Samsung's intentions.
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The same goes for the folks around us, whom we do not know, and whom we resemble only in our private desire to know more of what will unfold in public, on the stage or screen.
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