The phrase "assumed already" is correct and usable in written English.
It can be used when indicating that something has been taken for granted or accepted as true prior to a certain point in time.
Example: "The results of the experiment were based on data that had been assumed already, leading to potential inaccuracies."
Alternatives: "taken for granted" or "presumed beforehand".
With three senior politicians putting their name forward in a competition that was assumed already to be won, it is thought unlikely any other names will come forward.
Assumed already dead by many, the final Betamax cassette will roll off the production line in March 2016 as its maker concedes defeat to the march of time, 20,maybe 30, years late.
(DJN I.4.4, II.3.4) Thus, since moral norms are not directly linked to the intrinsic natures or purposes of things, or to the outcomes of actions, he was neither a teleologist nor a consequentialist in ethics (in the sense of maintaining an obligation to achieve or realize natural 'goods' or 'the good', which are assumed already to be morally compelling).
However, the perturbation bias in the y-coordinate is more or less insensitive to changes in N. The perturbation variance shows insignificant variation w.r.t changes in N since the minimum value of N assumed already considers several diffuse resolvable and possibly several diffuse unresolvable multipath.
Therefore, this reaction was assumed already in 1977 to be involved in energy conservation [ 73].
One of the possible limitations of this class of model is that a regular topographic map is assumed already to exist before feature-based columns begin to develop.
Say thank you to people who you assume already know you're grateful for the things they do for, such as parents, a spouse, and close friends.
Everything I needed, they assumed, was already in the wagon.
Parts of the coast that I assumed I already knew well also surprised me.
When she saw the doctor who referred her to Imip, he assumed she already knew.
