Yes/No Calculated Column

Hello and thank you in advance for any assistance you can provide:

I am using Sharepoint 2010 OOB

I would like to create a calculated column which returns a Yes/No if content is entered into a multiple line of text column. i know you cannot use multiple line of text columns in a calculated formula but i was wondering if there is a work-around.

I tried creating a single line of text column [More Information],

then i created a calculated column name [More Information 1] and i used the formula =[More Information]

then i deleted the single line of text column and created a new multiple line of text column and name it the same name of the single line of text column [More Information]

then i created a second calculated column named [More Information Y/N] and created the formula =NOT(ISBLANK([More Information 1]))

However, if there is no content is enterd in the multiple line of text column [More Information] the calculated column [More Information 1] displays a '?Name' which causes the calculated column [More Information Y/N] to display a 'Yes'

out of curiosity, i changed [More Information] back to a single line of text and the calculated column [More Information 1] displayed a '0', which obviously caused the calculated column [More Information Y/N] to display  'Yes'

Any help which can be provided would be greatly appreciated