A faulty decrescendo-decrescendo involves a negative source through failure to crescendo and/or to decrescendo properly. Since all went wrong, your target was off!
A faulty qualify-disqualify involves a negative source through failure to qualify and/or to disqualify properly. Since all went wrong, your target was off!

Decrescendo stimulates source but references target.
Disqualify stimulates source but references target.

A faulty q1n involves a negative q1s through failure to q1e and/or to q1r properly. Since all went wrong, your q1o was off!
A faulty q1n involves a negative q1s through failure to q1e and/or to q1r properly. Since all went wrong, your q1o was off!

q1r stimulates q1s but references q1o.
q1r stimulates q1s but references q1o.