I deal with a lot of troubled kids, the vast majority had no chance, with dysfunctional parents, daily viewings of violence and constant neglect because of parents being drunk or stoned, they didn't have much of a chance. 

In plenty of cases though, it is a non-confirming, red-tagged or dysfunctional property.

If you are dysfunctional about documentation, ask an experienced office clerk, a friendly (!)

2) Is it more likely that from the beginning the stoppage was caused by a dysfunctional pump, but the first plumber just took advantage to charge for that?

That's lazy thinking designed to help defeatists and egomaniacs along in their cognitive dysfunctions. 

It is not a sexual dysfunction]What you do is to FILE SOMETHING to the best of your ability, and AMEND the return when you are ready.You have three years from date of filing to AMEND a tax return.FILE SOMETHING - best guess. 

The original open deck and property line between the two properties was dysfunctional.

Right now I am reading "The five dysfunctions of a team" it has been great so far.

Otherwise, you can be required to fund HOA shortfall and/or have the property/community go dysfunctional.

This will result in anxiety ,frustration ,early  male  pattern baldness and possibly even erectile dysfunction so stay out of it !