Judge Posner hates ostriches. The large, flightless birds, erroneously thought to bury their heads in the sand at the sight of danger, are one of the Judge's favorite insults. Did you ignore adverse precedent? Ostrich! Somehow fail to check citing references? Ostrich conduct!
That doesn't mean he thinks ostrich behavior is criminal, however. Sometimes, closing your eyes to a problem is acceptable, the judge ruled yesterday. Overturning a conviction for conspiring to distribute cocaine, Posner rejected the use of "ostrich" instructions which urged a jury to convict if the defendant had deliberately avoided discovering his role in a trafficking scheme.