Allotropes of carbon dispersion of light of diamond make it useful for both industrial applications and jewelry. Diamond is the hardest known natural mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well. No known naturally occurring substance can cut (or even scratch) a diamond, except another diamond. The market for industrial-grade diamonds operates much differently from its gem-grade counterpart. Industrial diamonds are valued mostly for their hardness and heat conductivity, making many of the gemological characteristics of diamond, including clarity and color, mostly irrelevant. This helps explain why 80% of mined diamonds (equal to about 100
The Hardest Logic Puzzle Ever The Hardest Logic Puzzle Ever The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in "The Harvard Review of Philosophy" in 1996. Boolos' article includes multiple ways of solving the problem. A translation in Italian was published earlier in the newspaper "La Repubblica", under the title "L'indovinello più difficile del mondo". It is stated as follows: Boolos provides the following clarifications: a single god may be asked more than one question, questions are permitted to depend on the answers to earlier questions, and the nature of Random's response should