I give it like 5% you're serious, rather than just continuing the party in yanking Grantb's chain, but just so we've got it linked and fully explained here:
FAQ #24. Scroll down for:
There is a limit to the number of designated players a team can have on its roster at a time. A team can have up to two designated rookies (who received a longer rookie scale extension) and up to two designated veterans (who received higher than the 30% maximum salary) at any time. However, only one designated rookie and one designated veteran may have been acquired from another team in a trade.
This will be Kyrie's 8th full season in the NBA, and the last of his rookie-extension contract; he has a $21M player-option for 2019-20, which he will certainly decline. His rookie-extension was a Designated Rookie Extension contract, as he was all-NBA 3rd team in 2014-15, just before signing it. Kyrie does
not meet the performance criteria for a Designated Veteran (i.e., 35%-of-cap) contract, so he will only be eligible for a 30%-of-cap contract, and upon signing it will cease being a Designated Player for the purposes of the quoted rule.
Anthony Davis is in his 7th season, with 1 more contracted season remaining after this (at $27.1M), followed by a player option he will surely decline. He is the very definition of a Designated Player, having been all-NBA 1st team in 3 of the last 4 years. As such he will be eligible for a 35%-of-cap extension
with New Orleans this offseason, but if traded will be eligible for it with any team a year later, in summer 2020.
I believe that because Kyrie is on a rookie extension contract, he is now considered a "veteran", and as a result we cannot have both him and Davis on the roster because both would have been acquired by trade, violating the quoted rule. However, the first part of that statement is not clarified by anything I've seen written.