There is an ad for a knife on a TV, where the grape was cut 'so thin that you could read through it'. Challenge accepted. I used my small ceramic knife and sliced a grape in a wedge to see how thin does a grape have to be cut to be read-through thinness.
Conclusion: They could get a better knife.

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Не, нисам пироћанац и нисам насекао грожђе за госте. Само сам хтео да видим како се чита кроз један овакав пресек.
Лепо.