This explanation is a really terrible explanation - it doesn't even explain the point of the study or what multiple comparisons are in statistics...
This is what the salmon study was saying - if you did a whole brain analysis with fmri without an a priori prediction you need to adopt a radically more stringent threshold for significance
The salmon in the MRI was a bowl with a million jellybeans in it

Fermentation releases an order of magnitude more CO2 than you put back into it when you carbonate it