Typical Die Clashes (TDC):

Any die clash that shows clash marks which are normally associated with that denominational series. Example; clash marks seen in the Memorial building’s  bays 1, 2, 3, 8 and 9 on the reverse die of the Lincoln cent.  Clash marks left by numerals and letters are not considered atypical, as is the case with VAMs. However, cumulative clash marks which include numerals and letters may be considered atypical. 

What determines if a die clash is atypical or typical? 

The process is subjective in nature since it is based on the decisions of the authors of this site.  The prospective die clash is weighed against other die clashes that have been found in the denominational series and not weighed against all die clashes