The same Source and Destination address and ports

Solution 1:

Sure, source and destination IP address can be the same. That simply represents a connection between client and server (or 2 peers) on the same host.

Source and destination port can also be the same. If that happens, it would usually happen by coincidence.

But source and destination IP address being the same and source and destination port being the same? That doesn't make sense. That would represent a TCP connection connected to itself. Even if you wanted to do it (a kind of loopback connection), the protocol wouldn't be able to distinguish packets in one direction from packets in the other direction.