why do Robot tell a lie?

[lycier]

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While I play with Robot,I found Robot often tell a lie.

After double,north Robot raise to 2♠ showing 3+,6-9 total points.

I think north Robot bid 2♠ was a incorrect descriptive bid,I think it was better for Robot to bid 3♠ directly as a preemptive raise so as to let partner to do next rightly.

[Bbradley62]

I disagree. North fits in the 6-9 total points range, counting 3 points for the club void. I would consider making a stronger bid with the North hand, not a weaker one.

[georgi]

That hand is close to mixed invite - 3♦.

 

 

And from lie to better bid has some difference.

 

Here, there is no lie as 2♠ shows what GIB has. Just there is better bid probably. Could be 3♠ or 3♦, but explanation is correct.