12. It is forbidden to say about a lecturer that his lectures are boring, even if this is true.

13. One who confides a business or trade secret to three people, it is permitted for them to tell others, even if this might cause him harm. [This is true, only if none of the three are considered to be God fearing, a relative or close friend of this individual, as he will definitely not pass it on. So too, they cannot stress the issue, in a way that can cause him harm. Also, this is only as long as he didn’t ask them to keep it secret]. However, one who heard it from the original three listeners, it is forbidden for him to pass it on.