Potential answers for "Proven to work"

⭐⭐⭐⭐ TRIEDANDTRUE
⭐⭐ THEOREM
⭐⭐ TESTED
⭐⭐ QED
⭐⭐ TRUE
⭐⭐ SURE
⭐⭐ CASHCOW
⭐⭐ FACT

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