IF 4 MEGABYTES OF MEMORY IS BETTER THAN NO MEMORY AT ALL, THEN WE WILL BUY A NEW COMPUTER

10. If 4 megabytes of memory is better than no memory at all, then we will buy a new computer. If

we will buy a new computer, then we will buy more memory. 4 megabytes of memory is better

than no memory at all. Therefore we will buy more memory. Valid.