A couple are speaking at an event on 09-09-2007 .
It is likely that two people together were n't speaking at all at the event on 09-09-2007
It is impossible that two people together were n't speaking at all at the event on 09-09-2007
It is likely that two people together were n't speaking at all at the event on 09-09-2007
Two people together were n't speaking at all at the event on 09-09-2007