if and only if

If — and only if — it occurs next weekend against Ohio State.

If - and only if - it occurs next weekend against Ohio State.

“It’s kind of like an alternative universe — how Taiwanese politics could look like if, and only if, China weren’t an issue,” said Chieh-ting Yeh, the director of US Taiwan Watch, a think tank focused on U.S.-Taiwan relations.

Another relevant excerpt from the rule book: “In all Coach’s Challenge situations, the original call on the ice will be overturned if, and only if, a conclusive and irrefutable determination can be made on the basis of video evidence that the original call on the ice was clearly not correct. If a review is not conclusive and/or there is any doubt whatsoever as to whether the call on the ice was correct, the original call on the ice will be confirmed.”

“Ormat would seek BLM permission for further development if, and only if, the project proves the commercial viability of the geothermal resources,” it said.