Rather than an improvisation or a stereotype, the phrase is a variation of a ” face in the mirror” trope. While some of the book links at the above ngrams link suggest intentions of introspection, reflection, and looking deep within”, other links merely refer to a person looking into the mirror. What do you think if John Edwards said something like this today? I guess accepting responsibility probably entailed some introspection as to where the phrase is taken and

what do you think it does not necessarily imply it.

All of the words I first thought of ( typically, generally, ordinarily, and usually ) are somewhat stronger than “true on average”, but might serve your purpose anyway.

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."

"I suggest taskable, so help me." "Although it is commonly used to mean \"can have tasks assigned to\" the meaning of \"can be assigned as a task\" is not too much of a stretch." "Other possibilities (of varying quality, not listed in answers so far) include targetable, realizable, resolvable, shovel ready, work ready, assignable, energizable."