Dunno if this ever came up before.  What, if anything, does this mean?

_dmarc.example.com IN TXT "v=DMARC1; p=none"
_dmarc.example.com IN TXT "v=DMARC1; p=reject"

Looking through RFC 7489 I don't see anywhere that it says that more
than one record is forbidden.

For that matter, what if anything does this mean?

_dmarc.example.com IN TXT "v=DMARC1; p=none; p=reject"

In 7489 it says "DMARC records follow the extensible "tag-value"
syntax for DNS-based key records defined in DKIM [DKIM]."  I hope that
means they follow the DKIM rule that duplicate tags make the whole
record invalid, but that could be clearer.

R's,
John

PS: This came up when I was reading a guy's code where he carefully
looks at multiple records and somehow decides which one to believe.

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