The phrase "assertion that it is" is correct and usable in written English.
It can be used when discussing a claim or statement that something is true or exists in a particular way.
Example: "The assertion that it is the best solution available has not been substantiated with evidence."
Alternatives: "claim that it is" or "statement that it is".
Mr. Mondello's second assertion, that "it is profoundly wrong to give comfort to our enemies when your protest demeans the nation's armed forces," is incorrect.
Larry Rosen pointed out that some members' assertion (that "it is fundamental to open source that everyone can use a program for any purpose") is untrue.
Gone, too, was its assertion that "it is doubtful any child may reasonably be expected to succeed in life if he is denied the opportunity of an education.
Driscoll's further assertion that "it is not just critics but also readers who notice this packaging" is nonsense.
The chapter on cheap care, for instance, concludes with the assertion that "it is to cheap food that we now turn"; the chapter on cheap food ends with "it is to cheap energy that we now turn" – and so on.
The American influence also appears limited despite its assertion that it is building a strategic partnership with the Iraqis.
Yet what initially feels like denial is instead its opposite: the assertion that it is how we live rather than how we die that is important.
The most notable town to the north is Rovaniemi, which has built its economy on the assertion that it is the true home of Santa Claus.
Mr Carroll's postgame assertion that "it was not the right matchup for us to run the football" has been widely derided.
GRANT PETTY Fitchburg, Wis., Oct. 15, 2011 To the Editor: I disagree with a bank executive's assertion that "it's not a middle-class uprising".
Nevertheless, Mr Hackwell's case is an extremely rare one and his assertion that "it wasn't my time to go" must surely be the understatement of 2005.
