ABSTRACT
A.5 Argument validity tests unumQ[x] True if x is a valid unum, else False. floatQ[x] True if xcan convert to a float (real,±∞, or NaN), else False. gQ[x] True if x is a valid general interval, else False. uboundQ[x] True if x is a valid unum bound (single or paired), else False. uboundpairQ[x] True if x is a valid unum bound pair, else False. uQ[x] True if x is a valid unum or ubound, else False.
