[Q]: Would the following sentence, by the strictest standards, be considered correct? My brother is an Einstein at maths.
++++++++++
[A]: acceptable

[Q]: Would the following sentence, by the strictest standards, be considered correct? We have not confirmed whether the flight had been booked.
++++++++++
[A]: acceptable

[Q]: Would the following sentence, by the strictest standards, be considered correct? The rats ran through the maze.
++++++++++
[A]:
acceptable