This phrase literally translates to 'it's like a blind man leading another blind man.' It is used to describe a situation where a person who doesn't know much about a subject is trying to guide or teach someone else about the same subject.
Examples
- Spanish: Si yo te enseño física cuántica, es como un ciego guiando a otro ciego.
- English: If I'm teaching you quantum physics, it's like a blind man leading another blind man.