Full Idea
We can assert the general claim that smoking causes cancer without endorsing the claim that smoking necessitates cancer.
Gist of Idea
We assert causes without asserting that they necessitate their effects
Source
S.Mumford/R.Lill Anjum (Getting Causes from Powers [2011], 3.11)
Book Reference
Anjum,R.J./Mumford,S.: 'Getting Causes from Powers' [OUP 2011], p.71
A Reaction
This is the simplest demolition of the idea that effects necessarily follow causes. Necessitarians might wriggle out of it by focusing on the word 'causes' more closely here. Maybe this example isn't a 'strict' usage.