Einstein can't speak when he is 4 years old?

There are rumors on the Internet that Einstein was 4 years old (and some said it was 3 years old) and he couldn’t speak. It’s not good to talk when he was 9 years old. This is a rumor for Einstein! The truth is, according to the collection of the Hebrew University Library in Jerusalem, "The rumors about the low level of intelligence in Einstein's childhood," Einstein was able to say the whole sentence at the age of three, just Einstein. Before the age of 7, relatively introverted, always like to be silent, and often repeat their own words.

It is rumored that Einstein couldn't speak at the age of four. He wanted to prove that "the genius with high IQ is often slow in language development" by the arrangement of Einstein, and this theory is also untenable.