If defining the variable in an AND statement at the beginning of a function (i.e., IF+AND), I like to use the OR method, whereas when nested in an 'action' statement (i.e., during an vlax-for iteration, etc.) I use a COND method as Alan has shown.
Yes, using the COND method would work in both situations, but I choose to use similar/separate syntax for my own edification when reading the code later. Personal choice on my part.
Separately, I also take the time to write a SETQ for each variable, instead of including them all in a single call - I find it easier to make quick changes, or substitution/exclusion(s) on the fly by simply commenting out a single SETQ as needed. Again, my preference only FWIW.