[irjustin]

Absolutely, we're in agreement.

"Test" doesn't necessarily mean spend on FB/G Ads. It means devise a test feedback signal is quick, low cost and yields a meaningful/measurable metric.

An idea selling a more efficient ship engine to ship owners is never going to do well in Ads, but there is a test that is more cost effective than build engine => sell engine.

> Of course none of these can tell you the 'why' -- it might be something simple that you would never have thought of, but you end up pivoting too early.

This is a founder dilemma and the thing founders need-to/should worry about. Don't build until you've got at least a decent, objective signal the idea is worth the cost of building, but how you get there is a doozy.