To compute erroneously. Sir T. Browne. [1913 Webster]

VB  misjudge, misestimate, misthink, misconjecture, misconceive, fly in the face of facts, miscalculate, misreckon, miscompute, overestimate, underestimate, prejudge, forejudge, presuppose, presume, prejudicate, dogmatize, have a bias, have only one idea, jurare in verba magistri, run away with the notion, jump to a conclusion, rush to a conclusion, leap to a conclusion, judge hastily, shoot from the hip, jump to conclusions, look only at one side of the shield, view with jaundiced eye, view through distorting spectacles, not see beyond one's nose, dare pondus fumo, get the wrong sow by the ear, give a bias, give a twist, bias, warp, twist, prejudice, prepossess.