If it is true that...

Understanding users is the single most important issue for technology startups

and

The best way to figure out what customers want is to watch them and talk to them about what they need

Then it must be true that...

Building something users love and spending less than you make is key to startup success

If it is true that...

Understanding users is the single most important issue for technology startups

Then it must be true that...

The founders of a startup need to include at least one person who can focus on what customers want