Gury-Ballerini says this:
182. - Q. 1: What are the signs of perfect drunkenness?
Ans. The following are presented, namely: 1st, not knowing how to distinguish good from evil; 2nd, not remembering things said or done while drunk; 3rd, doing entirely unusual things, which, namely, are never wont to be done with a sound mind.... etc. - However, hesitation of the tongue, stumbling of the feet, seeing double objects, or objects spinning around are not certain signs. - St. Alphonsus Liguori, n. 78.
LATIN
182. - QUAER. 1° Quaenam sint signa ebrietatis perfectae?
Resp. Perhibentur sequentia, scilicet: 1° nescire distinguere bonum a malo; 2° non recordari de dictis aut factis in ebrietate; 3° agere omnino insolita, quae scilicet numquam alias sana mente agi solent.... etc. - Non autem sunt signa certa, haesitatio linguae, titubatio pedum, visus obiectorum duplicium, aut in gyrum se vertentium. - S. Lig. n. 78.