SO if someone tells you that they took cough syrup and they don't have a cough anymore so therefore cough medicine works. I have kept a virus scanner and malware scanner on my computer and never got a virus so it works.
There is a word that I know describes these false correlations but its all about the fact that they cannot prove it. You can't go back in time and then not take medicine and see if the same thing happened. You cannot go back in time and do the exact same thing with your computer to see if you still don't get a virus.
I am struggling to find the word that describes this and cannot remember what its called. Wondering if someone else can help.