This propsotion is false, isn't It? Yes 

Ordanry language, with polite convetilon

This propsition isn't, false? Yes! 

Boolean propsotnal function with polite convetion.

THis psositioin is  

Same Meaning as: 

This true propositiin is. 

Proof: 

This psositioin is, is true. 

This true propsitioin is, is true. 

THis true psoopsition is false 

This true false prositin is false by "contrdictio in adjecto".