Why Investors Don’t Trust Your Evidence (And What Actually Moves Partners)

12 Oct 2026 · 1 min

Watch on YouTube

0:45

In this concise advisory segment, Leon Eisen, PhD explains that investors are inherently skeptical of any evidence that founders can directly control, labeling it the "invisible game" of fundraising. He introduces the concept of "borrowed belief," where investors rely on external validation rather than founder-provided data. Because of this, investors often rewrite pitch decks and set their own milestones when the founder’s evidence is untrusted. Moreover, the external endorsements or signatures that truly sway a partner’s decision typically require a 2‑to‑4‑month acquisition period, meaning founders can waste months pursuing the wrong evidence if they ignore this dynamic.

Chapters

The evidence an investor trusts least is the evidence you control. You can control. That's the invisible game. The rule that investors borrow belief explains why good founders lose months on the wrong walk. Most founders prepare for a raise by improving the evidence. Investors trust, or else they rewrite the deck and announce their own milestones. Meanwhile, the outside signature that would move a partner can take 2 to 4 months to get.