It depends on what time period and location you mean. Some were encouraged to do so.
A slave was allowed to learn as much as his master needed him to know.
Giving slaves too much education was discouraged, as uneducated slaves were easier to control.
they werent forbidden they just simply couldnt.
slaves was forbidden in the area
More specific information is needed in order to answer.
Slave children were not allowed to read or write.
Because if they did learn, they learn how to rebel. then the might rebel and escape.
did Fredrick learn how to read
read and write
Some significant events in "Narrative of the Life of Frederick Douglass, an American Slave" include Douglass's escape from slavery, his education from his mistress despite being forbidden to learn, witnessing brutal whippings of fellow slaves, and his fight against Covey, a cruel slave breaker. These events highlight the horrors of slavery and Douglass's quest for freedom and self-empowerment.
((Washington, D.C.))
We learn about families that are brutal and do inhumane behaviors on their slaves.
In the 1700s, slave education was typically forbidden or severely limited by slave owners in order to maintain control and prevent slaves from seeking liberation. Some slaves were secretly taught to read and write by sympathetic individuals, but formal education for slaves was rare.
He already has. Shadow Clone technique, the first jutsu Naruto successfully learned was forbidden. I think also that Rasen Shuriken would be considered forbidden due to the harm it has on the user...