The future of the show's other two presenters - Hammond and May - is unclear, with both men's Top Gear contracts having run out.
He's done crucial research on language acquisition, and he offers an admirable account of syntax in his book, but it is unclear what he's talking about here.
He died suddenly in 2006 in unclear circumstances.
It is as yet unclear what effect, if any, the letter and its fallout could have on the seven-party nuclear talks that are due to reconvene in Switzerland on Sunday.
It is unclear whether the loss of ice is directly related to man-made climate change or a cyclical change in ocean currents.
If McGowan does upset the odds and win – she is placed at around $3.50 by Centrebet, down from more than $50 at the start of the campaign – it's unclear how well her values of inclusiveness and consensus will fare in the Canberra bear pit.
It can be unclear what the point of all these meetings is.
The report is the first time the UN body has accused Assaddirectly and it is unclear how it will affect January's Geneva II peace conference to try to end the country's bloody conflict, now in its 33rd month.
But it is unclear that he will be able to garner the 50% of votes he needs to win in the first round.
It also remains unclear exactly how many people are watching these beautifully made shows or how long term either company's plans are.
Decentralisation will be a key part of constitutional reform, but it remains unclear what form it will take.
