There are a lot of parts to the answer, at least in my experience with VCs.
Probably the biggest is just that they have a bias to be bullshitted (bullshat?). The are constantly searching for the next big thing, so they need these things to be true. They want them to be true. And human nature makes them scared of missing out.
Also, most of the VCs out there are not investing their own money, and have never actually operated a business. This is why they ask the same questions with slight variations, and get obsessed with metrics that may or may not apply to a given business. This also makes them easier to fool, although many make up for this hands-on inexperience with enough years of watching startups that they can "pattern match" rather than understand things from first principles.
Most also develop specialties. You're not going to fool an experienced blockchain VC with the made up or cherry-picked bitcoin numbers. But go next door on Sand Hill Rd and you can probably get away with it.
Probably the biggest is just that they have a bias to be bullshitted (bullshat?). The are constantly searching for the next big thing, so they need these things to be true. They want them to be true. And human nature makes them scared of missing out.
Also, most of the VCs out there are not investing their own money, and have never actually operated a business. This is why they ask the same questions with slight variations, and get obsessed with metrics that may or may not apply to a given business. This also makes them easier to fool, although many make up for this hands-on inexperience with enough years of watching startups that they can "pattern match" rather than understand things from first principles.
Most also develop specialties. You're not going to fool an experienced blockchain VC with the made up or cherry-picked bitcoin numbers. But go next door on Sand Hill Rd and you can probably get away with it.