The title is well supported by a statement in the paper (section 2.1, next to last para): "This clearly indicates that the “thrust” is not coming from the EMDrive but from some electromagnetic interaction." I think the conclusion is written in carefully understated scientific style.
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The only thing they measured was that the thrust vector was decoupled from the cavity orientation and did not decrease when power to the cavity was heavily attenuated (fig 10). They therefore concluded that the forces measured are not thrust from the EmDrive. Everything else is (likely correct) speculation.