You searched for: “pons asinorum
pons asinorum
Bridge of donkeys [asses].

A test for beginners; problem that the slow-witted cannot solve. It is anything except a "bridge"; it is really pedica asinorum, the "dolt's stumbling block."

Brewer's Dictionary of Phrase & Fable; revised by Ivor H. Evans; published by Harper & Row, Publishers; New York; 1981.
This entry is located in the following unit: Latin Proverbs, Mottoes, Phrases, and Words: Group P (page 6)
pons asinorum
The asses’ bridge, a critical test of the ability imposed upon the inexperienced or ignorant.