Premise:
"As anyone who has spent any time in a chat room knows, the bad tends to drive out the good."
Hypothesis: If you spend long enough in a chat room, you will become the thing you hate.

it is not possible to tell

Premise:
"Therefore, if you don't want to bother with converters, stick to the top-floor tax-free department specializing in export goods designed for use around the world."
Hypothesis: The departments are meant for using domestically only.

no

Premise:
"Not so the cante chico (light song), a more animated version performed in tablaos (floor shows) on the Costa Blanca."
Hypothesis: The cante chico is a written poem.
no