Mountaineers' safety will never be guaranteed, but these advances are reducing the risks and upping the odds that help can quickly be summoned should something go awry.
"If I don't do this, our sanitation will never be guaranteed," says one father working with his son to construct a latrine.
Speaking on Deutschlandfunk radio, Berlin's interior minister, Ehrhart Körting, told listeners that regardless of the best efforts of law enforcement, "Terrorists will not allow themselves to be disrupted by the warnings," and added, "You will never be able to guarantee 100 percent security against terrorists".
Today, too, there is no easy military solution to Afghanistan: even if we proceed with the current plan to spend billions equipping an Afghan Army of half a million troops, that force will never be able to guarantee security or shore up such a discredited regime.
There will never be a way to guarantee free, fair and nonviolent elections, particularly in countries where collective grievances are strong and institutional accountability weak.
The approximate number of children in the study will never be less than 600, guaranteeing 80% of study power (significant at a 5% level).
You can never be guaranteed that your popularity will remain high," says the chancellor, puffing on a cigar.
Then there will be no bank runs and the guarantee will never be invoked.
Many eggs will never be used, and pregnancy from them can't be guaranteed.
Your neurons and dendrites will never be quite the same - guaranteed.
Entrance, of course, can never be guaranteed.
