whoa lots of comments from many people I shall go i order.
thinker123
“The premise that a mesorah is needed to be מקיים the mitzvah of techeiles is contrary to the das torah of the Maharil and more who say that its possible to find the chilozon”
Im not familiar with the Mahril you mention, Even if it exists. halcha isnt decided based on what the Mahril held. R’ Chaim Kanievsky said it wont be found until Moshiach comes, R’ Elyashiv essentially said what said (that should be reversed obviously)
Thefakemaven
“You’re under the impression that a when a person gets married he has a mitzvah of giving a get…”
I m under no such impression. Your premise simply isnt accuate, as you admit as there is no race to fullfil mitzvos. If you need to give a get you give a get if you have abeged with daled kanfos you wear tzizis if you come across a nest and want the eggs yo udo shiluach hakein etc etc. There are soem mitzvos that are incumbent no matter waht. not all are.
” the same is with yibbum or any other circumstantial mitzvah.”
My point with yibum, is that even i a situation where there is a mitzvah of yibum (brother dies without children r”l) as you may or may not know, we STILL do not perfrom the mitzvah of yibum, instead chalitza is done. Even when the circumstance DOES call for yibum, we still forgo it.
As for accepting testimony (I dont have immediate access to your sources) . Even of a Yid isnt neccesarily accepted. For example R’ Elazar reports how he saw the tzitz in rome yet we dont pasken like him.