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true or false If a material has a hardness of 8, it cannot be scratched by a material with a hardness of 7.
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true or false If a material has a hardness of 8, it cannot be scratched by a material with a hardness of 7.

User Troels Folke
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it is true because of the hardness differences. if there are differences between other things they don't normally work like fitting a cube into a circle is kinda like trying to scratch something that has a higher hardness. 
User Morteza R
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