at vs on the same point in time

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Daniellll

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What do we say :

- at the same point in time

OR

-on the same point in time
 

emsr2d2

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What do we say :

- at the same point in time

OR

-on the same point in time

Context would help, but I'm going to say "at" anyway.
 

bhaisahab

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SoothingDave

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If you were discussing a graph of some data versus time, you might be able to say "on," but that's the only example I can think of.
 
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