I have little doubt you know this already though.
I was asking about the confirmation number because its inclusion indicates your level of knowledge. Please read this: https://en.bitcoin.it/wiki/Confirmation and this: https://bitcoil.co.il/Doublespend.pdf
I've already read over it and numerous other texts of the same nature. "Confirmations" continue to build as each block is buried deeper in the blockchain.
Thanks for sharing information (despite it being known).
You obviously don't understand. Here's some examples:
- Brick and mortar stores in Vancouver accept 0-confirmation (instant) transactions (typically using BitPay).
- just-dice.com allows you to start gambling after a single confirmation.
- the coin mixer on blockchain.info requires a variable number of confirmations (starting at 0) depending on how many BTC you want mixed.
- Bitfinex will post the BTC balance to your account after 3 confirmations.
- The Canadian Virtual Exchange requires 6 confirmations before allowing you to trade.
Users are free to consider the transaction as "complete" at any number of confirmations (including 0), depending on their need for security. Double spending simply goes from quite unlikely (at 0 confirmations) to incredibly mind-blowingly unlikely (at 10 confirmations), etc.