The company appears to be most concerned about rules that might force it to eliminate certain of its restrictions that limit how much data wireless customers can use.
For example, given a finite Abelian group, how can it be decomposed into a product of certain of its subgroups?
"Angry, pitiless, certain of its righteousness, intelligent but fatally incapable of proportionality and discrimination, it made a repellent impression".
Certain of its properties are known, though.
How can they be so certain of its outcome?
(Certain of its parts would be used to make a special collectible Tom Sachs skateboard).
Mr. Elliot said she first had wanted to be certain of its validity.
Other civil engineers, while intrigued by the research, are less certain of its significance.
Reform Jews tend to disregard Halakhah, though some of them adhere to certain of its precepts.
Several months later, however, Spain learned that France planned to seize certain of its northern provinces.
