Laughtest?第一关都通不过

Reader question:
Please explain this sentence, with “laugh test” in particular: Their claim does not meet the laugh test, let alone scientific rigor.
My comments:
Their claim, whatever that is, does not pass the laugh test, not to mention rigorous scientific examination.
What “does not meet the laugh test” actually implies here is that their claim is so wrong, unreasonable and outlandish that it is laughable.
It will get laughed at, in other words.
That’s the message being conveyed here.
The “laugh test” is an idiom because there’s no literal laugh test being taken. When people say something doesn’t meet or pass the laugh test, it’s about the same as saying something does not meet or pass the smell test.
Smell test?
Yeah, the smell test means something is easily detectable, such as, say, the stink of dead fish. You can smell it from a mile away. We can, for example, smell the odor of a fish market from a block away. So, if you want to hide the fact that you’re a fish vendor but you smell fish from head to toe, well, you don’t pass the smell test, literally.