These are all just different constructions that are related to "try and" only by coincidence. The fact that a different construction looks similar to a grammatically incoherent one by coincidence doesn't make the incoherent one coherent.
I disagree. GP is laying is laying out reasonable scenarios that are a few dropped/implied words away from the otherwise incoherent ones. For my part, this one is very grating to my ears:
"Try and tell the truth"
Since it clearly should be "try to tell the truth"
However this one, while similar in construction, doesn't actually sound nearly as bad:
"Try and finish the assignment"
It can be fixed the same way ("try to finish") but it also accept GP's form too, which would be "try (to work hard) and (see if you can) finish the assignment". As I say, for whatever reason this second example sounds much more reasonable to me— I think at least in part my brain is much more accepting of a word that feels dropped than one that's misused.
I disagree. GP is laying is laying out reasonable scenarios that are a few dropped/implied words away from the otherwise incoherent ones. For my part, this one is very grating to my ears:
"Try and tell the truth"
Since it clearly should be "try to tell the truth"
However this one, while similar in construction, doesn't actually sound nearly as bad:
"Try and finish the assignment"
It can be fixed the same way ("try to finish") but it also accept GP's form too, which would be "try (to work hard) and (see if you can) finish the assignment". As I say, for whatever reason this second example sounds much more reasonable to me— I think at least in part my brain is much more accepting of a word that feels dropped than one that's misused.