The phrase "a kind of speculation" is correct and usable in written English.
It can be used when discussing theories, hypotheses, or conjectures about a subject.
Example: "The scientist's theory was based on a kind of speculation about the behavior of dark matter in the universe."
Alternatives: "a form of conjecture" or "a type of hypothesis."
Like Mr. Sanders, Mr. Kerry is pushing for an oil reserve bill, because "we can't allow a kind of speculation process to destroy people's capacity just to make ends meet and live".
This question and the one above it both require a kind of speculation into the interiors of two fictional characters, and maybe this is a good place to state that I don't believe that any fictional characters, no matter how memorable, how lifelike, can be talked about, even by their author, as if they were real people, with actual psychological thickness and a reality beyond the edges of the book.
Kratz said the key thing is to address the problem now, before any kind of speculation begins, and while property values are still low enough that the city and the neighborhoods have options.
Although "we don't comment on any kind of speculation" about potential suitors, he said, "this management is open to strategic opportunities if they strengthen our brands, meet client needs and benefit our shareholders".
There has been a "kind of intense speculation," he said, "kind of a churning".
His style is extremely digressive, each episode a kind of fractal speculation.
Not only is he concerned with descriptive phenomenology, in which context his analysis of the religious functions of time and space is most illuminating, but also with a kind of metaphysical speculation (as exemplified in his idea of the "fall").
What drew her to Williams, apart from his singularly rapid-fire wit, was his creative generosity, attested to by most everyone in the documentary, sometimes with a kind of rueful speculation about what it must've felt like inside Robin's brain.
While distinct in important respects -- Mr. Lazio engaged in a different kind of speculation over a much shorter period, and did not reap nearly as much money -- his options windfall contains some echoes of the trading success of his Senate opponent, Hillary Rodham Clinton, in the late 1970's.
'Warm Leatherette' is a kind of prediction or speculation about the future so we thought it had a great connection to this project".
