6

not: as a matter of fact we are interested in learning what the conditions of true inference are: so we will just turn to where that question is considered. I fear that my present protest against their doing so may escape their eyes. But I will proceed to set down my reasons for holding that pure ethics, as just defined, although not part of logics is a matter of vital importance to the student of logic.

Here reasoning nothing more than what the old text books set forth, a man might be ever so great a rogue without being the worse reasoner for that. But in performing inductions certain moral virtues are required. A certain kind of probity is essential to succession of this work. In the highest presumptive reasoning, positive elevation of soul is called for. It is usually true, to say the least that a man must prefer the truth to his own vanity and even