How do you know the water Jesus turned to wine was fermented?

In John chapter 2 verse 10 the Words have well drunk is interpreted in the Greek as "to drink to intoxication " it is Word number 3184 in the strongs concordance and is methuo in Greek. Further to this, others point to the fact that methuo is here in the passive voice in Greek and also to the fact that the person making the statement was talking about usual practice and not necessarily to what was happening at this particular wedding. The simple fact is we do not know and those who suggest the wine was not fermented point to the fact that Jesus would thus effectively be countenancing a substance we know to be harmful, despite the antioxidents, and would be approving of drunkenness. In addition, there is evidence that the ancients actually made a substance they called 'wine' by boiling off the water and skimming off the substances which cause fermentation. This ennables long storage and transport and relates to Jesus illustration about wine in new and old wineskins. They would then re-constitute this substance with the addition of water when they required the 'wine'.