They're measuring an anomalous force in an electromagnetic cavity. That's a measurement, a concrete fact. They're claiming that they'll be able to make a starship with it. That's beyond any credibility. It's totally delusional.
Jesus H you're dishonest. They HOPE to use it to propel objects from LEO to GEO. The reason that NASA is looking into this is in the HOPE that it bears fruit. NOBODY said they WILL be able to make a starship with it.
Some of the statements get rather ambitious, but they aren't statements of fact they're suggestions about what COULD be possible if this pans out.