possibly.

They could, in theory, have been paid twice if someone hadn't caught the error.

Opposite of: in practice. Related vocabulary: in principle

• in reduced circumstances
• in reference to
• in reference to something
• in relation to
• in relation to something
• in reserve
• in retrospect
• in return
• in return for
• in return for something
• in right mind
• in safe hands
• ins and outs
• ins and outs of
• ins and outs of something
• in season
• in shadow
• in shoes
• in short
• in short order
• in short supply
• in sights
• in situ
• in small doses
• in so many words