I know what you mean, but imagine for one split second that you're a toad-faced scum (of the benevolent and well-meaning sort, as of course you would be
) - how exactly could you
prove what somebody's intentions are, even if you suspect? Although you might have arranged viewings for them of 10 or 20 houses, none of which they've bought, it
could still be true that there was something they weren't prepared to accept about every one of them. If they're still there, saying, 'Show me houses,' you're not going to say, 'No, cos I think you don't mean it,' when it's your whole living to sell houses.