From Madeleine Bunting:
[T]he key criteria for that legitimate debate on Islam is that it must be rooted in knowledge.Ugh! And double ugh! 'Criteria' is a plural. Its singular is 'criterion'.
Usage Note: Like the analogous etymological plurals agenda and data, criteria is widely used as a singular form. Unlike them, however, it is not yet acceptable in that use.Also here. There are worse things than this about Madeleine Bunting's writing.