Word: clear
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...clear whether highly developed language skills actually play a role in fending off Alzheimer's disease or whether the correlation is merely a side effect of other protective processes. Indeed, Iacono's study, which involved 38 nuns, only 14 of whom he had writing samples from, is too small to show a definitive effect. But the way Iacono looks at it, no one knows how much of the risk of dementia is hardwired into our DNA and how much is determined by environmental factors like physical exercise and social activity, so while the jury is still out, brushing...
Because of their late start (researchers had intended to study mice from early ages but were stymied by technical difficulties), scientists weren't sure they could expect clear results. However, even administered late in life, rapamycin delayed the deaths of the longest-lived male mice by 101 days and by 151 days in the longest-lived females - the equivalent of about 13 years on average in humans - compared with mice with no treatment. In terms of life expectancy when treatment began (or average remaining lifespan when the mice were 600 days old), that translates to an increase...
...days, giving two excellent speeches about the need for a stimulus plan and general economic reform. He has lost that focus as his other initiatives have come online; he has failed to speak with precision or clarity about the bills wandering through Congress. He has failed to make clear what needs to be in those bills - and what can't be - if he is going to sign them. He also needs to update the public on his stimulus plan, especially now that his Vice President inadvertently dissed it. And he needs to make a direct assault on the greedheads...
...that can be labeled a tax or a regulation. To make things more difficult, the public doesn't consider health or energy reform as crucial as the President (rightly) does. Most people are happy with their health insurance, although they're worried about losing it. And they are not clear about the sacrifices necessary to address climate change - or the national-security issues raised by our dependence on oil provided by some of the more disgraceful governments in the world...
...depending on air support? Well, one, we have an extraordinarily intelligent and mature force now. We have had for a number of years. The way I would frame it to them is, Suppose the insurgent occupies an enemy home or village and engages you from there, with the clear idea that when you respond, you are going to create collateral damage. He's going to blame that on you. Even if you kill the insurgent there - and in many cases you don't, you just destroy a lot of things - you get a tactical success and near-term satisfaction because...