Updating on conditional information

This paper, concentrating on deductions among conditional expressions, extends some previous ideas of the author as an alternative to the use of conditional event algebra. The approach taken here is through metalanguage-based “high probability relations”. Higher order conditionals are also treated in the same metalevel format, in contrast to the object language format of conditional event algebra. Other comparisons with conditional event algebra are also discussed, and a potentially promising technique is presented for connecting metalanguage probability relations with object language relations