The phrase "even supposing" is correct and can be used in written English.
It is often used to introduce a hypothetical or unlikely situation. Example: Even supposing I had all the time in the world, I don't think I would be able to finish this project on time.
Even supposing cnooc did this, it wouldn't affect American consumers.
Even supposing the technology works, where would they land?
Even supposing the captain succeeds in getting 11 players on the field, against that ideal opposition, there still remain infinite ways in which things can go wrong.
Even supposing that fMRI were able to tell us where a particular cognitive process was performed, that would likely tell us little of relevance about how it was performed.
Even supposing it is not a step too far for the firm, Millennium may find that big pharmaceutical companies start to perceive that a chemical engineer can be more of a rival than a friend.
Even supposing the 35% of the population who say they don't want extra channels had been persuaded to buy a set-top box, there is still the little problem of all those second and third televisions that end up in bedrooms and kitchens.
Even supposing an account of freedom could be offered to answer this question, Bayle still finds the free-will defence unsatisfying on account of God's alleged omniscience.
Even supposing the Nazis had had some historical facts on their side--would that have justified the extermination of 6 people with similar surnames, not to mention 6 million?
Even supposing the genetic association with T2D is demonstrated to arise from TCF7L2's function in pancreatic beta cells, these data provide evidence that the role of TCF7L2 in regulating glucose metabolism from other tissues seems to be more robust.
But arranging both is tricky, even supposing that Japan can summon the will to do so.
But even supposing there were such a thing, wouldn't the skin itself be the something inside?
