11.   I made an error in my calculations.

12.   It will be most unlikely that serious errors will be made, providing that adequate records have been kept and that these are accessible to those needing them.

13.   People do not make errors merely because they are careless or inattentive.

14.   When asked to reach for these objects, subjects make corresponding errors.

15.   He found that although the rats in the third group made many errors until the eleventh day, upon reinforcement on this day they made almost no mistakes.

16.   If an error is made this should be made clear via an SSR replying to the SPR.

17.   If an error is made this should be made clear in an SSR which replies to the SPR.

18.   On the other hand, people will make errors if they are forced to make a decision too early.

19.   He is thus encouraged to work quickly, in spite of the likelihood of making errors which are difficult to rectify once the tesserae have become semi-bonded.

20.   She says it was a breakdown in communication and they made an error.