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"TCP/IP" is a suite which includes UDP and these TCP-like protocols implemented in user space are encapsulated with UDP. So it's technically still correct, though it's not as snappy of a saying if you have to add "but actually"...
UDP is not included in TCP/IP. Maybe that's what people mean when they shorthand say TCP/IP. But technically UDP is an alternative to TCP and also builds on top of IP.
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