They provide no Adsense revenue and, equally importantly, give Google none of the signalling information about user behaviour and intention that, for example, feeds Google Now.

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If they enter jointly, they should be sure to include all required information and documents for each spouse and clearly indicate their intention to disclose jointly.

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If, rather than monitoring the data generally, you look for confirmation of your own hypotheses about intention, then you can speed up and narrow the stream of information you need to take in.

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