These attacks are almost impossible to stop because they are directed against civilians, who cannot all be defended, and the bombers are willing to die in order to destroy their targets.
Double European indoor champion Laura Muir, sprinter Asha Philip and hurdler Andrew Pozzi will all be defending their titles from Belgrade in 2017.
Those same people rarely have funds to spare and should, above all, be defended from shabby tricks, spurious "methods" and intellectual manipulation.
At the same time, the view that aesthetic appreciation of nature is parasitic upon that of art and even the idea that it is not in fact aesthetic appreciation at all were defended by some thinkers.
Child marriage, marital rape and intersex and female genital mutilation have all been defended on grounds of culture and tradition, as have restrictions on women driving, voting, working or inheriting property.
The thesis that all mental contents are wide is defended by Davidson (1987) in his "swampman" thought experiment.
"First of all, Ariel Sharon is defending his country against terrorist attacks, just like we will".
The agency has no apparent problem with that; after all, he is defending not only his own handiwork but also the agency's.
He turns two runs through square, but otherwise is defending all the way up to the drinks break.
It has been the biggest casualty of the local elections so far - losing all the seats it is defending.
Suddenly, all of France is defending a national champion against a non-existent attack.
