The Kitzur Shulchan Aruch, 117:1, says that before Pesach, Chametz is batel b'shishim. So for example, a bottle of 100% apple juice, even if it hasn't been certified that you can know 100% sure that ...
The New Croton Reservoir supplies much of New York City's tap water, and people are allowed to — and do — go out on boats and fish. I'd venture a guess that almost every Saturday and Sunday, a piece ...
If chametz can be batel before Pesach, why don't we buy (before Pesach) any commercially produced product with year-round (i.e., not Pesach-specific) kosher certification which does not list chametz ...