The Infineon case began in August 2000 , when Rambus accused Infineon of patent infringement and Infineon counter-sued Rambus for breach of contract and fraud .
At that time , Rambus accused Infineon of patent infringement and Infineon countersued Rambus for breach of contract and fraud .
Are these two sentences paraphrases of each other?
OPT:
a). no;
b). yes;
b).