> For the complete documentation index, see [llms.txt](https://earn.blink.sv/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://earn.blink.sv/chapter-202-attributes-of-a-good-store-of-value/202.05-lesson-verifiability.md). # 202.5 Lesson - verifiability **Screen:** verifiability **Headline:** The good must be easy to quickly identify and verify as authentic **Reward:** 3 **Text:** It is important for a good store of value to be easily verifiable as authentic. This increases confidence in trade and the likelihood that a transaction will be completed. Both fiat currencies and gold are generally easy to verify, but they are not foolproof. Counterfeit bills and gold-plated tungsten have been used to deceive people in the past. On the other hand, the use of cryptography makes verification very easy for bitcoin and makes counterfeiting impossible. \================================================================= ## QUIZ **Question:** How can bitcoin be verified? **Answer:** By using cryptographic signatures **Feedback:** Congratulations! You are correct. Bitcoin can be verified with mathematical certainty using cryptographic signatures **Correct:** true **Answer:** By checking for gold-plated tungsten **Feedback:** Sorry, but that's not quite right. Better luck next time **Correct:** false **Answer:** By checking for features on banknotes to prevent counterfeiting **Feedback:** Wrong! Bitcoin is purely digital and doesn't utilize banknotes. Try again! **Correct:** false