I got a voicemail from a sales person. He left me his name, the name of a very large technology company and his phone number. Why would I possibly call him back without any context of why he was calling? Did I download an ebook and he was following up by phone? I don’t know. Was he cold calling me about a product that might be useful to me? I don’t know. Was this an exploratory call to get to know me to see if he could help me? Again, I had no idea who he was or why he was calling. It’s no surprise that I didn’t call him back.