http://www.politifact.com/truth-o-meter/statements/2015/jul/... http://www.politifact.com/virginia/statements/2016/jun/20/do...
Bernie's saying its 50%~, Trump is saying its 60%~. Sure its a 8 percent difference at most, but that difference reveals how they got their number. The gist of both articles is that Bernie is inflating his number with people that have part-time work but want full-time while Trump is inflating with high school and college students.
The rulings on both articles basically point to this: Sander's number has more issue with semantics than actually including people that are not actively seeking a job like Trump's number. Trump doesn't get POF because of your objection: while derived wrong it's "decently" close. Quotes because an 8 point difference is very large when talking unemployment numbers.
The inaccurate thing about Bernie's statement was that he cited U6 as a measure of "unemployment" when it would more accurately be called a measure of "underemployment". It includes people who want a full-time job but can only find a part-time job even though they aren't fully unemployed.
Trump cited 100% - labor force participation rate as a measure of unemployment, which is complete nonsense because it counts people who are full-time students or who are disabled as unemployed.
Perhaps the point here is that what is "true" and what is "false" aren't entirely black or white. Depending on how you look at it, full-time students aren't employed; they are therefore unemployed. In some contexts, people who currently do not hold a job are an accurate representation of unemployed. And therein lies the rub: context is incredibly important.