So the Reformed think Rome's state of pure nature fictitious and impossible
They therefore regard as plainly fictitious and impossible the state of man "in a purely natural condition" that the Roman school so often speaks of. In it man is supposed to be uncorrupted by sin and yet empty of righteousness and holiness: not clinging to God with a pure and chaste love but dragged toward lower things by his own concupiscence, ignorant of what true blessedness requires, weak and unable to do good, and inclined headlong toward vice.
This can be gathered from the treatises of the Reformed teachers cited above, and of many others, where they argue about original righteousness against Bellarmine and other teachers of the Roman school.
Latin
XXXV. Ac proinde plane fictitium & impossibilem censent statum illum hominis in puris naturalibus, cujus saepe in Schola Romana mentio fit; in quo supponitur homo peccato non corruptus, & tamen justitia & sanctitate vacuus, Deoque non adhaerens puro & casto amore, sed propria concupiscentia ad inferiora tractus, ignorans quae ad veram beatitudinem necessaria sunt, ad bonum perficiendum infirmus & impotens, & ad vitia praecipiti inclinatione proclivis, sicut colligere est ex Doctorum Reformatorum, qui supra citati sunt, & plurimorum aliorum dissertationibus, dum de justitia Originali adversus Bellarminum, aliosque Doctores Scholae Romanae disputant.