See the parallel text at Luke 20:27-36.
It's a GREAT one for refuting the unbiblical Watchtower 144,000/other sheep doctrine.
First off, in questioning Jesus on the subject of the resurrection, the Sadducee's refer to people UNDER THE LAW OF MOSES, i.e. in the "Old" Covenant.
Hence,
"Teacher, Moses wrote us..." (verse 28).
Of course - as you're well aware - the Watchtower teach that such people will be resurrected to a 1000-year "trial" (Judgment Day) on EARTH. They also teach that, through disobedience, such resurrectees can be punished WITH DEATH.
But look at Jesus' response to their example, He says that such,
"...NEITHER CAN THEY DIE ANYMORE, FOR THEY ARE LIKE ANGELS..." (verse 36, caps mine)
But surely - according to Watchtower teaching - the above statement ONLY applies to the 144,000?
See the contradiction?
Unlike the WT, of course, who claim that obedience to Jehovah during a 1000-year trial is additionally required to secure eternal life.