"are already assumed" is a grammatically correct phrase and can be used in written English.
It is typically used to indicate that something has already been taken for granted or accepted as true. Example: The rules and regulations of the club are already assumed to be known by all members.
Many are already assumed in our modelling but key new cost guidance (better than expected) assists our base case forecasts.
Today's national initiatives like the 9/11 Commission Act for scanning 100% of cargo at foreign ports of origin may be useful for interception of smuggled materials that are already assumed to be in transit -- by simply creating a roadblock for smuggling on high traffic routes, this does not get us any closer to dissuading adversaries from attacking by other means.
Spokesmen at WHO and America's Centre for Science in the Public Interest point out wearily that although a third of all cancers are already assumed to be caused by diet, two decades of advice on healthy eating have produced only marginal improvements in our eating habits, while obesity and cancer rates are still rising.
Reindeer herders are already assumed and encouraged to benefit from increasing ecotourism through transformations from 'extractive' livelihoods to ecotourism-oriented businesses (Stritih et al.2007).2007
But for practical purposes, lawmakers and lobbyists are already assuming that $100 billion, and maybe $150 billion, is on the table.
Yet analysts and investors are already assuming that Incivek will be overtaken in a few years by other drugs.
Many analysts contend that investors in both stocks and bonds are already assuming that a recovery is under way -- and that it will be strong.
That is why even though many more people could still end up getting vaccinated this season -- especially if a severe outbreak of flu occurs soon -- some industry and public health officials are already assuming there will be leftovers.
Some analysts are already assuming in their financial models that Windows Vista, the next version of the desktop operating system, will be delayed another three months or so beyond its scheduled introduction to consumers in January.
The Yankees' hitters are already assuming the games against the Diamondbacks' All-Star pitchers will resemble their battles with Boston's Pedro Martínez, in which the Yankees have consistently prevailed over the last two years.
