devézlfler, *to ascertain

17. il est impoflsilile qnll ait. Hère the principal sentence expressing the likëlihood of the action is négative^ and hence is followed by a subjunctive. But il est possible^ being hypothetical, would also take a subjunctive after it, as the speaker does not vouch for the truth of the statement. See Eve §§ 239 (2) and Obs. ,341.

35. nul doute que...inoiuieigiieur ne lui fit grftce. This is another case of the subjunctive after a phrase denoting probability or the reverse. See note on L 17.