Idem est nihil dicere et insufficienter dicere. It is the same thing to say nothing and not to say it sufficiently¹. 2 Co. Inst. 178.

Idem est scire aut scire debet aut potuisse. To be able to know is the same as to know. This maxim² is applied³ to the duty of every one to know the law.

Idem non esse et non apparet. It is the same thing not to exist and not to appear. Jenk. Cent. 207.

Idem semper antecedenti proximo refertur. The same is always referred to its next antecedent. Co. Litt. 385.

Identitas vera colligitur ex multitudine signorum. True identity is collected from a number of signs.

Id perfectum est quod ex omnibus suis partibus constat. That is perfect which is complete in all its parts. 9 Co. 9.

Id possumus quod de jure possumus. We may do what is allowed by law. Lane, 116.

Ignorantia excusatur, non juris sed facti. Ignorance of fact may excuse, but not ignorance of law. See Ignorance.

Ignorantia legis neminem excusat. Ignorance of fact may excuse, but not ignorance of law. 4 Bouv. Inst. n. 3828.

Ignorantia facti excusat, ignorantia juris non excusat. Ignorance of facts excuses, ignorance of law does not excuse. 1 Co. 177; 4 Bouv. Inst. n 3828. See Ignorance.

Ignorantia judicis est calamitas innocentis. The ignorance of the judge is the misforture of the innocent. 2 Co. Inst. 591.

Ignorantia terminis ignoratur et ars. An ignorance of terms is to be ignorant of the art. Co. Litt. 2.

Illud quod alias⁴ licitum non est necessitas facit licitum, et necessitas inducit privilegium quod jure privatur. That which is not otherwise permitted, necessity allows, and necessity makes a privilege which supersedes⁵ the law. 10 Co. 61.

Imperitia culpae annumeratur. Ignorance, or want of skill, is considered a negligence⁶, for which one who professes⁷ skill is responsible. Dig. 50, 17, 132; 1 Bouv. Inst. n. 1004.

Impersonalitas non concludit nec ligat. Impersonality⁸ neither concludes nor binds⁹. Co. Litt. 352.