Today in class our professor explained that a proposition is a sentence that declares a fact that either true or false but not both. However, shortly after he defined Atomic Proposition as "No part is a proposition" with an example of a proposition.
After researching around it seems that the two are identical as I can't find any definitions that show differences between the two.
A quick and easy explanation between the two would be awesome as I should have asked him during class.
Thanks!