If bread is excessively moldy, how does one determine if it is certainly chametz?

PesachPassoverChametz Disposal

Synopsis

If bread is so moldy that it could not have become moldy within the timeframe of Passover so far, it is presumed to be old chametz. However, if one bakes fresh bread daily during Passover, mold can be attributed to daily placement of warm bread.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

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