Quick answer
We treat Passover and unleavened-bread language as a supporting argument, not the only argument. The study’s point is that leaven and fermentation should not be waved away when biblical readers are already being asked to think about purity, remembrance, and holy observance.
The argument is not that every use of leaven does all the interpretive work. It is that Passover settings make the fermented-wine assumption less casual than many readers suppose.
Why leaven enters the discussion
The broader study ties yeast and fermentation to one of the practical questions readers often ignore: what sort of liquid (wine) is being imagined at the Passover feast and memorial settings? When Scripture emphasizes unleavened conditions must be observed and that no leaven (yeast) can be inside the dwelling, we think that should at least slow down automatic alcohol readings.
What this page is and is not claiming
This page is not trying to prove the entire case from one feast law. It is a supporting page that belongs under the larger types-of-wine discussion. The main arguments still include definitions, warning verses, and Christ-centered reasoning.
How to use this page
Let it sharpen the question. Do not let it replace the bigger study.
Why the page is linked to Cana and memorial questions
Because readers often move quickly from “wine existed” to “therefore Christ must have supplied intoxicating wine.” This page is one of several reminders that biblical feast settings are not morally neutral backdrops.
Read next
Parent study
Types of wine in the Bible
Return to the larger guide page that shows how this supporting argument fits within our categories.
Preservation
Biblical wine preservation
See why we say fermentation was not the only way to preserve grape liquid.
Cana
Did Jesus make alcohol?
Read the Christ-centered page that connects these issues to the wedding at Cana.