Do these sentences mean the same? Is one preferable to the other?
I think Ben is a robot. If he is, we should not talk to him anymore.
I think Ben is a robot. If he is one, we should not talk to him anymore.
Do these sentences mean the same? Is one preferable to the other?
I think Ben is a robot. If he is, we should not talk to him anymore.
I think Ben is a robot. If he is one, we should not talk to him anymore.
Both read well. I would use (1) in emails/chat, everyday use because it is shorter, more efficient and more lazy. I would use (2) in literature writing to clearly define meaning and ensure complete sentences, such as "I think Ben is a robot. If indeed Ben is a mechanical entity then perhaps we should stop interacting with him.