Yes, we have to test out our theories and results many times before we can be sure they are correct. Sometimes you are not able to get the same result twice so you really need to be careful that what you are doing can be done over and over again, but anyone else! It can be very frustrating at times!
We need to be sure that what we are saying through our theories and experiments are 100% correct though so that is why everything is thoroughly tested!
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