On Fri, 02 Feb 2018 00:36:00 +0000, Peter Humphrey wrote: > > The rule of thumb I was taught is that if you can dispense with the > > second part without significantly changing the meaning, use which, > > otherwise use that. > > I agree. You haven't consulted Fowler though, I see. (Drat! Where's my > copy when I need it?) He says the difference is whether we have a > defining clause. If what follows actually defines the subject of the > sentence, use "that". Otherwise it's "which". That's the definition I learned, thank for reminding me of it's name. -- Neil Bothwick I used to have a handle on life, then it broke.