My proof is this particular clematis which is on its third life, at least.
I thought it was a goner after the patio re-do back in 2010. The removing of pavers and the addition of a better base for the pavers kicked up a lot of dust, covering this clematis during a hot spell in July.
Plus, the workmen kicked it, stepped on it, trampled it, and otherwise beat it to the ground while working on the patio.
Once they finished the patio, I washed off the clematis, cut it back and figured it was a goner.
I was as wrong as wrong can be. As wrong as a fig flower.
The clematis came back.
Then this summer, in August, more workmen came and kicked the clematis, stepped on it, trampled it, and otherwise beat it to the ground when they dug a trench to re-route a downspout.
Once they were done, I cut the clematis back and figured it was a goner, again. I said my goodbyes and...
Not so fast.
The clematis has grown at least three feet in a month's time and is once again blooming.
I'm glad I like this clematis because it appears it is never going away. Ever.
Anyway, plants are resilient.
Remember that and stop molly-coddling them. (But don't intentionally kick them, step on them, trample them or otherwise beat them to the ground, either.)