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The term is used many times on the whitepaper but I can't find a definition. What would be examples of a conflicting transaction?

Extract form Whitepaper:

The main idea of the tangle is the following: to issue a transaction, users must work to approve other transactions. Therefore, users who issue a transaction are contributing to the network’s security. It is assumed that the nodes check if the approved transactions are not conflicting. If a node finds that a transaction is in conflict with the tangle history, the node will not approve the conflicting transaction in either a direct or indirect manner³.

  • Please provide more context. A citation of an extract from the whitepaper, you don't understand due to the missing definition, would increase the quality of your Question a lot. – Tobi MZ Feb 25 '18 at 3:12
  • First appearance on final of page 2: "It is assumed that the nodes check if the approved transactions are not conflicting". Hence my question, what would that be? – user1710 Feb 25 '18 at 3:17
  • make sure your questions fullfill the qualitystandards – Tobi MZ Feb 25 '18 at 3:23
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Transactions are conflicting if they try to spend the same money from the same address (and the address does not include enough money to satisfy both at the same time - but this should not happen anyway, as compliant clients will move the remaining balance to a change address - but can of course happen if an adversary tries this).

Either this can be because there is a real double spend (e. g. somebody tried to send the same funds to two different addresses) or in case somebody reattaches their transactions (only one of the transfers can confirm then).

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