Traitors UK 4 - probably spoilers

I’m not sure why the banished/murdered keep on thinking in the Uncloaked interview or reveal that there could be still 4 Traitors left or even more. They have caught 2, there has been no obvious seduction opportunities (they have chosen to murder instead) - did they think there were originally 6 ot more Traitors? The turret isn’t big enough.
 
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