TypeError: Cannot read property 'has' of undefined
    at Interface.<anonymous> (/home/ubuntu/workspace/Cheddar/dist/interpreter/tests/repl.js:138:39)
    at emitOne (events.js:77:13)
    at Interface.emit (events.js:169:7)
    at Interface._onLine (readline.js:211:10)
    at Interface._line (readline.js:550:8)
    at Interface._ttyWrite (readline.js:827:14)
    at ReadStream.onkeypress (readline.js:106:10)
    at emitTwo (events.js:87:13)
    at ReadStream.emit (events.js:172:7)
    at emitKeys (readline.js:1251:14)

?=aeeexaae

? ternary:
 = equality:
  a(e)
  e
 e
 x call this function with the arguments:
  a
  ae a(e)

function alexIsFalse(input){
    if(input.user == "Alex A."){
// api Get stuff removed for simplicity
    chat("You are wrong: " + nlp.statement(input.txt).negate().text());
    }
}