What constitutes an 'innovation' (chidush) in a blessing when praying a voluntary prayer?

PrayerVoluntary Prayer

Synopsis

The definition and requirements for what counts as a genuine innovation to distinguish voluntary prayer from obligatory prayer.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

The Daily Law

One question. Every opinion. Every morning.

A new halakhic question and the full spectrum of rabbinic thought, delivered daily.