Q: chapters i and ii are concerned with the propositional calculus, discussing tautologies and the decision problem, duality, consistency and completeness, and independence of the axioms and rules of inference.
A: Chapters I and II are concerned with the propositional calculus, discussing tautologies and the decision problem, duality, consistency and completeness, and independence of the axioms and rules of inference.

Q: additional types of files may also be using the tbx file extension. if you are aware of any other file formats using the tbx file extension, please contact us so that we can update our information accordingly.
A: Additional types of files may also be using the TBX file extension. If you are aware of any other file formats using the TBX file extension, please contact us so that we can update our information accordingly.

Q: eu aims to create new alliances prior to the rio+20 summit
A: EU aims to create new alliances prior to the Rio+20 summit

Q: a new extreme challenge is plaguing me… now i think a little’ to rest and soon after we talk about.
A:
A new extreme challenge is plaguing me… now I think a little’ to rest and soon after we talk about.