This is an excerpt from the U.S. Federal Rules of Evidence about testimonies of expert witnesses. There are 6 mistakes in the text. Are you able to spot them?
Comment: trier means a person who tries the case, i.e. the judge
Rule 702. Testimony by Expert Witnesses
A witness who is qualificated as an expert by knowledge, skill, experience, training, or education may testimony in the form of an opinion or otherwise if:
the experts scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidences or to determinate a fact in issue;
the testimony is based on sufficient facts or datas;
the testimony is the product of reliable principles and…