Recover a deal that went quiet right after it looked interested

A deal went quiet right after showing real interest, and I want to actually diagnose why before sending another nudge that gets ignored like the last one.

Deal: Ferngate Logistics, contact Tobias Lindgren, stage demo completed, asked for a formal proposal. The specific signal of interest before they went quiet: asked detailed pricing questions on the demo call and said he wanted to bring it to his team. What they specifically asked for or agreed to before going quiet: a formal proposal with three pricing tiers, which was sent within a day. How long it's actually been since any real response: 17 days, no response to two follow-up emails.

DIAGNOSE BEFORE RESPONDING
This exact pattern — real interest, a specific ask granted, then silence — has a small number of common causes, and the right response differs sharply depending on which one it actually is. Walk through these possibilities against what's known and name which one or two are most plausible here, not all five treated as equally likely: (1) the request itself surfaced a new internal step, like a security review or budget approval, that's now quietly consuming time on their end without them thinking to update you; (2) a genuine change in priority or urgency happened on their side, unrelated to your product, that has nothing to do with anything you did or said; (3) what was sent didn't actually answer the real question behind the ask, and they've moved on without saying so rather than asking a follow-up; (4) the interest was real but was never anchored to a specific enough next step or date, so it simply had nothing forcing a reply; (5) this was a soft no from the start, and the information request was a polite way to end the conversation without directly declining.

THE RECOVERY MESSAGE
Based on the one or two most plausible causes identified above, write a message that doesn't just ask "did you get a chance to look at this" — that phrasing assumes cause 4 or 5 and will read as naive if the real cause is 1 or 2. Instead, write a message that gives them an easy, specific, low-effort way to signal which situation it actually is without having to write an explanation — a short multiple-choice-style question embedded naturally in the message works better here than an open-ended "how's it going," since an open question to someone who's already gone quiet is asking for more effort than a one-line answer.

WHAT NOT TO DO
Do not send anything that repeats a formal proposal with three pricing tiers, which was sent within a day back to them as if reminding them it exists will prompt a response — if they haven't engaged with it in 17 days, no response to two follow-up emails, restating that it exists adds no new information. Do not apologize for following up; there's nothing to apologize for, and an apology subtly reframes a reasonable business follow-up as an intrusion.

HONEST READ
Given 17 days, no response to two follow-up emails and everything else known, tell me plainly whether this deal is still realistically alive or should be moved to a much longer-cycle nurture track instead of an active-deal cadence — a quiet deal chased with active-deal urgency past a certain point just looks needy rather than diligent.