1&2 Each block is appended to the chain until a miner solves the next block then one of those (the one not chosen by the miner) will be orphaned from the chain.
The network will always choose to continue with the longest chain so if there exist two or more versions the new blocks on the shorter chains will be dropped.
Waiting until 6 more blocks are confirmed lowers the risk of a block being dropped.
*not certain how waiting works?
When two miners create valid blocks and append them to the blockchain simultaneously it creates two seperate blockchains in the network. Eventually, a newly mined block will be appended to one of these blocks and that longer blockchain will be accepted by all nodes because it is the longest chain.
A stale block is the last block on blockchain that has been rejected by the network
A stale block arises when that block is the last block on a blockchain that has been rejected by the network because another blockchain in the network became longer. The longest blockchain is always accepted as “truth”.
It is important to wait for more than one confirmations because this is increasing assurance that your transaction will is not in a atale block that will be returned to the mempool.
I think there is still a bit of confusion about this 
the reason we wait for 6 confirmations is to be sure that our transaction is not part of the stale block the blocks are small enough to be quite sure the block will arrive to your node within 10 min (which would show as 1 confirmation in your wallet). But this block can become stale and your tx dropped back into the mempool.
What are you not certain about? You wait for the network to mine more blocks. Each block means a confirmation. When your transaction is mined it has 1 confirmation, after about an hour 5 more blocks will get mined and that will mean your tx has 6 confirmations
I’m imagining how that works if everyone is waiting 6 transactions as a rule. Essentially then there is a built in lag to the network. But I guess that’s fine!
1.) Two miners mine a legitimate block at the same time and distribute their own version of the blockchain to the network. Two versions of the blockchain are now created.
2.) A mined block that was dropped, because it is on the shorter blockchain.
3.) The next block determines which blockchain will be continued. The longer chain wins and the shorter one is obsolete.
4.) One of my own transactions may have been deposited in such a potential stale block and could soon be discarded. The reversed transactions stored in that Stale Block will go back to the Mempool.
the longest chain will win
blocks that didn’t get chosen as part of the longer chain to become permanent part of chain and is dropped
They happen when 2 versions are produced and the one that was part of longer chain was accepted
to make sure all nodes have updated and correct version of transactions
Both blocks will compete until the one with the longest chain will be accepted, and the other one will become invalid
A stale block is a block that has been discarded in favor of an alternative that has been accepted by the nodes
If two or more miners complete a block at the same time, but only one can be accepted, the other becomes stale.
The more nodes that accept a block, the more confidence you can have in its validity, therefore only one confirmation is insufficient for security.
Both are propagated to the network, some nodes will get one first, some will get the other. After the next block the longest chain then gets up dated to the nodes with which block is actual truth.
The dropped block that was not hashed into the next block
Two block solutions submitted around the same time and one gets rejected as there cannot be two versions of truth, longest chain is truth
The fewer confs you have the higher the chance that the block containing your tx could become stale leaving you without the goods or services sold and without the bitcoin either. 6 confs is the rule of thumb but this will take 60mins +/-
waiting just means as a vendor of say a Lambo, you want to make sure that u get the btc before the guy drives into the sunset. So you and he wait an hour together before he gets the keys. Similarly ive heard stories of local bitcoin dealers sending the BTC and waiting with the guy, when he knows he has the BTC he does a runner without handing over the cash, goes both ways but there is no lag effect to the networks by you two sitting around together for an hour to make sure the BTC is as good as permanent.
Yeah nothing wrong with that. Sounds like a good time in fact
With the Bitcoin network, when two miners solve a block at the same time they begin to propagate their block throughout the network, creating two valid versions of the blockchain. When another miner comes along they begin to append their block to one of these blocks, depending on whichever valid version of the blockchain they have received.
When one of the valid blocks is not appended it turns into a stale block and is dropped. With it’s transactions going back into the mempool.
Stale blocks occur when a valid block is not chosen and is dropped.
It is important to wait for more than one block to be confirmed when sending or receiving a transaction as your transaction may be in a stale block.
Temporarily there are two different versions of the block chain. The miners of the next block are based on one of the two versions.
Now the version with the longest chain wins, the transactions of the other chain end up back in the mempool
A block that is no longer part of the current blockchain.
If miner create a valid block at the same time. The block which will not be a part of the next main version of the chain is the stale block
Thus, there is a high probability that the transaction is not based on an obsolete version of the blockchain
What happens in the bitcoin network when two miners solve a block at the same time?
The longest chain will win and the other is erased from existence.
What is a stale block? The losing block…its sent back to the mempool and eventually dropped.
How do stale blocks occur? It occurs when two blocks are being mined simultaneously, the longer block moves on and the other block becomes the stale block.
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction? to ensure that your transaction is not dropped from the chain.
Exactly. Sorry for the late reply.
Two versions of the blockchain become propagated in the network. The one that gathers the most Proof Of Work first and has further blocks added becomes the default ‘true’ blockchain.
The block from the chain that did not become established as ‘true’ reverts to the mempool and is called a stale block.
They are blocks that are added to the blockchain at the same time as other blocks but the other blocks accumulate more Proof of Work and become permanent while the stale blocks revert to the mempool.
To be sure that your transaction does not end up in a stale block.