Can Any Person Be Hypnotised?

Can Any Person Be Hypnotized?

A Comprehensive Instruction
Manual of Hypnosis

People of average intelligence (unless there is some form of organic brain damage)
can be hypnotized in most cases if they are willing and do not resist.
The depth of hypnosis varies with a person's ability to respond.

If you are not a naturally responsive subject, you can improve your
receptivity to hypnosis with practice.

A Comprehensive Instruction
Manual of Hypnosis