Data entered incorrectly

This problem arises through several means. Primarily, errors or spelling mistakes account for a great deal of uncertainty (i.e. is his last name Potter or Petter?). Another factor is when the initial person entering the data has not had proper instruction. Someone who does not know how to work an application correctly, may mistakenly give one impression when they are aiming for another. A third way data can be entered incorrectly is by deliberate means. People often lie about who they are or certain aspects of their lives. Topics commonly falsified are:

• Age
• Weight
• Education Level
• Name

Please respond to any further ways data is misinterpreted.