Article starts by stating that DNS doesn't provide a means to guarantee integrity of the returned DNS data.
Then mentions DNSSEC as a protocol which exists to provide such guarantee and promptly dismisses it along with DNSCURVE and DNSCRYPT as protocols which have been so infrequently deployed as to be non-existent.
Further on states that DNS over TLS and DNS over HTTPS don't solve the integrity problem but that is ok because DNSSEC will provide that.
Then mentions DNSSEC as a protocol which exists to provide such guarantee and promptly dismisses it along with DNSCURVE and DNSCRYPT as protocols which have been so infrequently deployed as to be non-existent.
Further on states that DNS over TLS and DNS over HTTPS don't solve the integrity problem but that is ok because DNSSEC will provide that.
My head is spinning.