jgbtc

This makes perfect sense. Don't you know of any other situations in which the timechain could split?

0xbitcoiner

Block split; blocks can be orphaned. You should really think of a 1-confirmation block as provisional only.

These blocks are created when two miners solve a block at nearly the same time. The Bitcoin network, which operates on a consensus mechanism, will only accept one of these blocks, leading to the other being ‘orphaned.’ This phenomenon is a direct result of the decentralized and competitive nature of Bitcoin mining, where multiple miners across the globe attempt to add new blocks to the blockchain simultaneously.

bitcoin_beginners

Why isn't one confirmation enough for a bitcoin transaction?

Block split; blocks can be orphaned. You should really think of a 1-confirmation block as provisional only. 

> These blocks are created when two miners solve a block at nearly the same time. The Bitcoin network, which operates on a consensus mechanism, will only accept one of these blocks, leading to the other being ‘orphaned.’ This phenomenon is a direct result of the decentralized and competitive nature of Bitcoin mining, where multiple miners across the globe attempt to add new blocks to the blockchain simultaneously.

https://d-central.tech/orphan-blocks-the-overlooked-pieces-of-bitcoins-blockchain-puzzle/