Answer the question with a question

[polywideblock]

that could be him couldn't it?

[dyslexic teddybear]

would it be hard to tell if he wore a disguise?

[Fred]

would you recognise him in a line up?

[JB400]

Has anyone even seen him before?

[Fred]

hasn't he been in disguise?

[JB400]

How can we distinguish him from any other person?

[Fred]

doesn't he have a big mole on his nose?

[polywideblock]

how big is this  nose that can hold up a mole?

[JB400]

Is his nose bigger than normal?

[Fred]

maybe the mole covers more than his nose?  (not sure if that's a proper question but it will have to do)

[polywideblock]

how big is the mole?

[Fred]

do you want a definition of the word big?

[JB400]

Can you give him a definition of big?

[polywideblock]

wouldn't how big something is be a mater of perspective?

[Fred]

do you have any perspective to spare?

[polywideblock]

how much do you need before you consider yourself to have some to  spare?

[dyslexic teddybear]

depends on what one has to spare, doesn't it?

[burnout.dawg]

How much does he have to spare?

[dyslexic teddybear]

can someone spare more?

[polywideblock]

if you have to many spares wont you have no room in your trunk?

[dyslexic teddybear]

would depend on how big your trunk is, right?

[nvrbdn]

what if your big trunk was left?

[polywideblock]

left where?

[nvrbdn]

would that be left behind?

[burnout.dawg]

where would you keep the spare?