Other options are also problematic.
"But these other systems are also problematic," Professor O'Brien continued.
Mr. Sondheim's lyrics are also problematic for jazz singers.
But they are also problematic on three crucial fronts.
The differences – especially in governance, funding, accreditation and inspection are also problematic.
Signatures are also problematic: they can be forged, and can change over time.
(Bags are not alone among the plastic products that present recycling challenges; packing foam peanuts, for example, are also problematic).
To maintain Medicare payments to doctors and fund a dramatic increase in transport infrastructure, including $53 billion for high speed rail, the budget counts on Congress coming up with as much as $650 billion; absurdly, it doesn't say how.Mr Obama's plans to raise taxes are also problematic.
Holidays are also problematic: the Fostering Network, which represents foster-carers, says that many foster parents are unwilling to have children only for the holidays.Those who think boarding schools could work magic on many vulnerable children chafe at the slow pace of progress.
Taxes are also problematic.
The minifigs are also problematic.
