function onlyOne(input1, input2, input3){
output = false;
let truthy = 0;
let falsey = 0;
if (!!input1) {
    truthy++;
} else falsey++;
if  (!!input2) {
    truthy++;
} else falsey++;
if (!!input3) {
    truthy++;
} else falsey++;
if (falsey > truthy) {
    output = true;
}
if (falsey > 2) {
    output = false;
}
return output;
}

function onlyOne(input1, input2, input3){
    if(input1 && !input2 && !input3) return true;
    if(!input1 && input2 && !input3) return true;
    if(!input1 && !input2 && input3) return true;
    return false;
}

function onlyOne(input1, input2, input3){
    if(input1 || input2 || input3) {
        if(!input2 && !input3) return true;
        if(!input1 && !input3) return true;
        if(!input1 && !input2) return true;
    }
    return false;
}

const xor = (a, b) => !a ^ !b;
const onlyOne = (a, b, c) => xor(xor(xor(a, b), c), a && b && c)

function onlyOne(a, b, c){
    if (a) {
        // a is true
        if (b) {
            // a and b are true
            return false;
        }
        // a is true b is false
        return c ? false : true;
    }
    // a is false
    if (b) {
        // a is false, b is true
        return c ? false : true;
    }
    // a and b are false
    return c ? true : false;
}

function onlyOne(a, b, c){
    if (a) { return b ? false : c ? false : true }
    return b ? (c ? false : true) : (c ? true : false);
}

const table = [false,true,true,false,true,false,false,false];
function onlyOne(a,b,c){
    return table[(a ? 1 : 0) + (b ? 2 : 0) + (c ? 4 : 0)];
}

const onlyOne = (a, b, c) => (!!a ^ !!b  ^ !!c) ^ (a && b && c);