The introduction:
- Attracts the audience.
- Explains the topic.
- Declares the thesis of your argument.
Introduction :
Reading human mind is a frequent material that is used in SF movies such as X-man series. Besides, magicians can read or pretend to read human mind by using various magic tricks. However, is reading human mind an impossible thing in real life that can only happen in the movie? Lots of scientists have studied for a long time to make reading human mind possible. As a result, various methods like brain scanning and a lie detector have been suggested for reading human mind. If these methods are used in crime related area, people can know whether the criminal is lying or not when he or she is making statement. Also, it is expected to be possibe to know the possiblity of second conviction of criminals after their release. However, the effectiveness of these methods, especially brain scanning, is still a matter of debate. Accordingly, there is a variety of opinion about whether these methods can be used in professional areas. Brain scanning is an effective way to pick our criminals. 
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