Premise:
"it's like a mystery uh theater uh that you you know you eat dinner and all through dinner they're they're doing this act and they they get supposedly get the audience involved in it and everything and that that sounds like that would be hilarious you know"
Hypothesis: they ask audience members to come on stage

it is not possible to tell

Premise:
"And no-one is indispensable."
Hypothesis: Everyone is replaceable

yes

Premise:
"Christopher Columbus, the seafaring captain from Genoa (whom at least three Mallorcan towns claim as their own) believed he could reach the East Indies by sailing westwards."
Hypothesis: Columbus thought he would make it to the Indies by traveling west.
yes