VCs require a speculative future vision for fundraising. Founders must provide this but keep it in a separate mental "box" from the practical, present-day realities of building the company. Conflating the two poisons your actual strategy and erodes sanity.
When a prospect says something positive like, "This would save us money," overthinking founders mentally add, "...therefore, I will buy it." This is a dangerous form of speculation. To avoid this, founders must become exceptionally literal about what customers actually say versus what they wish they would say.
A competitor's website is speculation, as you can't know if customers buy because of or despite the messaging. The only way to get real intelligence is through first-hand analysis: interviewing people who recently made a purchase decision in your market to understand how they evaluated their options.
Relying on aggregate PLG data (signups, usage) is a trap. This data is an abstraction that hides the 'why'. To make correct decisions, you must talk to individual users to uncover the specific, "spiky" anecdotes that explain the numbers. The truth isn't in the dashboard; it's in the story.
Founders often merge multiple customer stories into an abstract "super-case study" that resonates with no one. A more effective approach is to find one single, repeatable success story and build the entire go-to-market motion around finding and closing more of that exact type of customer.
Telling an overthinker to simply "stop speculating" is ineffective. A better strategy is to schedule a dedicated time block—like a Friday afternoon—for that activity. This quarantines the behavior, preventing it from bleeding into productive hours while providing a necessary outlet.