Can a Berachah be made LeVatalah retroactively?
What if you eat something that is spoiled, not realizing it until a bite or two in? You would not make a Berachah on spoiled food. But if you did, and you ate it, and then you realized it was spoiled, does your Berachah retroactively become in vain? Would it make a difference if you had either an extreme reaction or a neutral reaction?