(15) The reliance on scientific evidence appears to present almost insurmountable problems of proof of causation to the plaintiff.(14) No insurmountable problems in the development of the artificial heart have been identified.(13) The authors conclude that though the process to primary mental health care will be a long one, the problems are unlikely to be insurmountable.(12) The study of agonist-antagonist interactions may be aided by the use of these procedures, as descriptions of insurmountable antagonism may be complemented by the identification of stimulus conditions associated with the antagonist, as well as those conditions that represent novel stimulus states.(11) The scale and depth of the climate challenge may seem insurmountable, and politicians will tell us with no irony, that they cannot sell, and no one will buy the policy ticket necessary for our own environmental rescue.(10) Recent data suggest that hyperacute rejection may not represent an insurmountable barrier to discordant xenotransplantation.(9) In the pithed rat, EXP3892 showed selective and insurmountable AII antagonism.(8) David Cameron is preparing to bow to insurmountable political opposition by putting the coalition's flagship NHS reform bill on hold beyond Easter, and possibly for as long as three months.(7) The challenges sometimes feel insurmountable, Tousif says.(6) loxtidine and lamitidine, are insurmountable H2-receptor blockers.(5) This speech was designed to allow progressives once again to see Barack Obama as they have always wanted to see him, his policies notwithstanding: as a deeply thoughtful, moral, complex leader who is doing his level best, despite often insurmountable obstacles, to bring about all those Good Things that progressives thought they would be getting when they empowered him.(4) The following myths are discussed and refuted: (1) There is an insurmountable community-research chasm.(3) They serve only to create insurmountable barriers that effectively eliminate medical abortions as an available option.'.

(2) It presents a challenge, but not an insurmountable one.(1) Residual technical problems remain which should not prove insurmountable.(a.) Incapable of being passed over, surmounted, or overcome insuperable as, insurmountable difficulty or obstacle.

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