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Of course she doesn't. She has no understanding of any actual technical details. She can bullshit good enough to trick people who don't know anything. This is not my area so someone call me wrong and gay, but the classic more well known coins are based on the original conception of solving the double spend problem through a "chain" (hence the name) or transactions. Each block is added and therefore can be traced backed. Bitcoin, etherium, litecoin etc all use these. There is something known as a private blockchain but I have no idea how that works. It seems dumb. Like this one
This is going to be a very rough analogy, and I barely know how this works... but monero uses a kind of "one time code" instead of a public address added to the chain. My understanding is this works as a sort of asymmetrical key, similar to a digital signature. The owner of the private key can decrypt the transaction, and the public key is used to encrypt it. So you can claim ownership, but with an encrypted "signature" in a sense. So while privacy coins like monero are technically public, they are anonymized or obfuscated further.
To prevent the double spending in anonymized coins like monero, my understanding is that its similar to a signed url , of which i'm more familiar. If you've ever downloaded an asset from a website only to click the link again and the "link expired" or something like that its likely using some CDN and signing implementation. Essentially the link you get contains an expiration time, then the cdn passes that through to the api server if the time has expired and/or the auth fails you can't access the resource. So using your private key in something like monero, you'd have access as a one time link and only you are able to decrypt the transaction. Since this is tracked on the chain publicly it doesn't fall prey to the double spend attack.
