Chip Leader - Mandatory Call?

[Martin Aigner]

I was writing about Betgos post:

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Calling would be a really bad play. You are on the button, so you have no chips already invested.

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As I satated before, it´s only about the odds, but not about the money he had already invested.

An example: You play a guy heads up, on the turn the pot is 600, meaning both of you invested 300 so far. You have a flushdraw, but no other outs. You opponent bets 300, obviously you shouldn´t call. Does the fact that you already invested 300 change the odds?

Hope, that makes clear what I intented to say.

Best regards

Martin Aigner