What does it mean for a transaction to reference previous transactions? Is it just listing them, rather than using them as inputs?<p>&gt; If two conflicting transactions appear, as more transactions are added to the
DAG-chain, the number of confirmations of one of the two will increase, but the other will not<p>Is that just because people go with whichever has the most references and&#x2F;or proof-of-work so far?