The discussion centers on the correct syntax for using the `cout` statement in C++. The initial example, `cout << "2 + 3 * 5 = " 2+3*5 << endl;`, is identified as incorrect due to improper syntax. The correct version, `cout << "2 + 3 * 5 = " << (2+3*5) << endl;`, is confirmed to be valid. Participants emphasize the necessity of using the `<<` operator to separate string outputs from variable outputs in C++. There is a suggestion to compile and test the second example to verify its functionality, highlighting the importance of syntax in avoiding compilation errors.