ratiocinate

And then there was silence, deep and impressive, while everybody got his "ratiocinating apparatus," as the Parson called it, to work.

Under this revelation of personality acting in utter disregard of the person—of any wish or will of the ratiocinating individual—she rested breathless.

The German, however, is articulate and ratiocinating where we are more purely instinctive.

But don’t ratiocinate with me—I cannot bear it.

To see facts, not to argue or raisonniren, was what life meant for him; and I think he often positively loathed the ratiocinating type of mind.